Door & Window Lock Manufacturer · China

Mortise Locks and Aluminum Door Locks: Lock Bodies, Sliding Door Locks, Glass Door Locks and Window Locks – A Buyer's Guide from the Factory

A mortise lock is a lock whose body (the lock case) is fitted inside a pocket cut into the door edge, with the latch, the deadbolt or hook and the cylinder all working from that one case. HIPAD manufactures mortise lock bodies, hook locks for sliding doors, glass door center locks, multipoint locks, crescent and keyed window locks for aluminum, uPVC, wooden and glass doors from 30 to 80 mm thick. Door and window factories, profile system companies and hardware distributors in 60+ countries source complete lock sets from us.

Mortise lock bodies
Sliding door hook locks
Glass door locks
Multipoint locks
Crescent & keyed window locks
OEM since 2000

Request Lock Catalog & Price Mortise Lock Size Guide

Lever handle and mortise lock with key cylinder on a dark entrance door

What Is a Mortise Lock, and How Is It Different from Other Door Locks?

A door lock has three parts that must fit each other and the door: the lock body in or on the door, the cylinder or thumb-turn that the key operates, and the handle that retracts the latch. In a mortise lock the body sits inside the door edge, so it is strong, hidden and works with a lever handle set. Surface (rim) locks sit on the door face instead, and cylindrical (bored) locks fit through round holes.

Aluminum doors have narrow profiles, so they use narrow mortise bodies with a short backset, or hook locks on sliding doors whose hook grips the keeper instead of a latch. Glass doors without frames use center locks or patch locks clamped to the glass.

In Mexico a door lock is a chapa (chapa para puerta de aluminio); elsewhere in Latin America it is a cerradura (cerradura de embutir for a mortise lock, cerradura de gancho for a hook lock). In Brazil it is a fechadura (fechadura de embutir, fechadura para porta de vidro, fechadura multiponto).

HIPAD Locks: Key Facts

Manufacturer: HIPAD, Qingdao, China, founded in 2000
Mortise lock bodies: HK series HI-5025 to HI-5030, for 35–70 mm aluminum doors; brass, zinc alloy, iron or stainless steel
Sliding door locks: hook locks and flush locks for 30–60 mm doors
Glass door locks: center locks HI-5003 to HI-5022 for single and double glass doors; patch locks
Multipoint locks: for 40–80 mm entrance doors
Window locks: crescent (sash) locks, keyed window locks, sliding window lock handles
Ordering: samples 5–7 days · production 20–25 working days · OEM logo and packing

Step 1 · Lock type

Types of Door and Window Locks We Manufacture

Quick answer: hinged aluminum, wooden and steel doors use a mortise lock body with a cylinder and lever handle set; aluminum sliding doors use a hook lock; frameless glass doors use a center lock or patch lock; large entrance doors use a multipoint lock; sliding windows use a crescent lock or a lock handle, with a keyed version where security matters.

Mortise lock body with faceplate and strike plate

Hinged doors

Mortise Lock Bodies

HK lock cases with latch and deadbolt for aluminum, wooden and steel doors, 35–70 mm. Narrow bodies for aluminum profiles.

Lever handle set with mortise lock body and cylinder

Complete sets

Mortise Handle Sets

Lever handles, lock body, cylinder and strike packed as one set for aluminum and entry doors, 40–80 mm.

Sliding doors

Aluminum Sliding Door Locks

Hook locks and flush locks such as HDL103 and HDL107 for aluminum patio and balcony doors, 30–60 mm.

Frameless glass

Glass Door Locks

Center locks for single and double glass doors (HI-5003 to HI-5022) and patch fittings with lock. See glass door hardware.

Multipoint lock on an entrance door with long handle

Entrance doors

Multipoint Locks

Several locking points along the door edge, driven by one handle, for 40–80 mm entrance and security doors.

Sliding windows

Crescent (Sash) Locks

Cam locks for the meeting rails of sliding windows, in aluminum or zinc alloy, chrome, white or black.

White keyed lock for aluminum sliding windows

Window security

Window Locks with Key

Keyed locks for sliding, casement and tilt-and-turn windows where security or child safety matters.

Sliding windows

Sliding Window Lock Handles

Handle, lock and positioning in one compact part, with optional key cylinder.

Also from HIPAD: concealed flush bolts for the fixed leaf of double doors, and pull handles with lock for glass entrance doors.

Step 2 · Mortise lock body

Mortise Lock Body Sizes: Backset, Centers and Case

Quick answer: a mortise lock body is chosen by backset (door edge to the center of the handle or cylinder) and by centers (handle spindle to cylinder). Narrow aluminum profiles need a short backset of about 25–35 mm; wooden and steel doors usually take 45–60 mm. Lock bodies are often named by these two numbers, for example 3585 = 35 mm backset, 85 mm centers.

Order a lock body by backset, centers, case depth and height, faceplate width and length, latch and bolt type, and handing. Not to scale.

Common naming in the lock trade. Confirm backset, centers and case size against your profile drawing; two bodies with the same code can still differ in faceplate and case depth.
Common body code	Backset	Centers	Typical door
2585 / 3085	25 / 30 mm	85 mm	Narrow-stile aluminum doors
3585	35 mm	85 mm	Aluminum doors, 35–50 mm profiles
4085 / 4585	40 / 45 mm	85 mm	Wooden and composite doors
5085 / 6085	50 / 60 mm	85 mm	Wooden, steel and security doors
5572	55 mm	72 mm	European (DIN-style) interior and entrance doors
6068 / 5050	60 / 50 mm	68 / 50 mm	Regional standards and smart lock bodies

HIPAD HK mortise lock bodies

From the HIPAD 2025 catalog. Backset, faceplate and keeper drawings for each model on request.
Model	Case size (mm)	Material
HI-5025 / HI-5026	172 × 31 × 20	Brass, zinc alloy or iron
HI-5027	160 × 106 × 22	Stainless steel
HI-5028	160 × 106 × 22	Brass, zinc alloy or iron
HI-5029	130 × 47	Stainless steel
HI-5030	112 × 46	Stainless steel

Step 3 · Sliding doors

Sliding Door Locks: Hook Lock or Latch?

A sliding door cannot use an ordinary latch, because the door moves sideways past the frame. Aluminum sliding doors use a hook lock: a hook in the lock body swings out and grips a keeper on the frame, so the door cannot be lifted or slid open. Light interior sliding doors can use a simpler flush lock or latch.

Lock	How it holds	Use
Hook lock (mortise)	Hook grips the frame keeper	Aluminum patio and balcony doors, 30–60 mm
Flush lock with key	Bolt into the frame; key or thumb-turn	Sliding doors that need a flat inside face
Multipoint sliding lock	Two or more hooks along the edge	Large lift-and-slide and high-security doors
Bathroom sliding lock	Small bolt or turn latch	Interior and shower sliding doors

More on choosing sliding door locks in the sliding door hardware guide.

Step 4 · Glass doors

Glass Door Locks

Frameless glass doors have no profile to hold a lock body, so the lock is clamped to the glass. A center lock joins the two leaves of a double glass door, or locks a single door to a fixed panel; a patch lock sits in the bottom patch fitting and bolts into the floor.

Center locks for single and double glass doors. Patch fittings with lock: HI-3007, HI-3009, HI-3011 and HI-3013.
HIPAD model	Size (mm)
HI-5003 to HI-5006	100 × 66 × 80
HI-5007 / HI-5008	82 × 85
HI-5009 to HI-5012	192 × 48 × 96 and 85 × 48 × 96
HI-5013 to HI-5016	75 × 58 × 23
HI-5017 / HI-5018	90 × 65
HI-5019 / HI-5020	75 × 40
HI-5021 / HI-5022	90 × 55 × 65

Step 5 · Windows

Window Locks: Crescent, Keyed and Lock Handles

Lock	Window	Notes
Crescent (sash) lock	Sliding windows	Cam on one rail turns into a keeper on the other; chrome, white or black
Sliding window lock handle	Sliding windows	Pull, lock and position in one part
Window lock with key	Sliding, casement, tilt-and-turn	Stops opening without the key; child safety
Casement handle with lock	Casement windows	Drives cam or multipoint rods

Before ordering a crescent lock, record the rail offset, mounting centers and keeper position; see the crescent lock guide and the window hardware guide.

Step 6 · Entrance doors

Multipoint Door Locks

A multipoint lock locks the door at three or more points along its edge, usually a central lock case plus top and bottom hooks, bolts or rollers, all moved by one handle and cylinder. It pulls the door evenly against the seals and resists forced entry much better than a single latch.

For entrance and security doors 40–80 mm thick
Record the gearbox backset, handle-to-cylinder centers, spindle and faceplate
Define the number and position of locking points and the keepers on the frame
Match the cylinder length to the door thickness and handle sets

See the multipoint lock specification guide.

Step 7 · Door type and material

Which Lock for Which Door?

Door or window	Lock	Material	Thickness	Key option	Finish
Aluminum hinged door	Mortise lock body + lever set	Steel + zinc alloy	35–70 mm	Optional	Plated / black
Aluminum sliding door	Hook lock or flush lock	Zinc alloy	30–60 mm	Optional	Powder coated
Entrance door	Multipoint lock	Steel core	40–80 mm	Yes	Industrial
Frameless glass door	Center lock or patch lock	Stainless steel	Glass door	Yes	Satin / polished
Sliding window	Crescent lock or lock handle	Aluminum, zinc alloy	Frame system	Optional	Chrome / white / black
Any door with a key	Cylinder	Brass + steel	To door thickness	Yes	Nickel

Materials

Stainless steel (SS304): lock cases, faceplates and glass door locks for wet, coastal and high-traffic doors
Zinc alloy: die-cast bodies, hook locks, crescent locks and handles
Steel and iron: internal mechanisms and multipoint rods
Brass: cylinders and keys

Finishes

Electroplated: nickel, chrome
Powder coated: white, black, silver, bronze, or RAL colors matched to the profile
Anodized, matte black and satin stainless

Ordering

What to Send for a Lock Quotation

Door or window: type, material, profile drawing, finished thickness
Lock: type, backset, centers, faceplate size, latch, deadbolt or hook
Cylinder: length, thumb-turn or key both sides, number of keys, keyed alike or master keyed if needed
Handing: left or right, inward or outward opening
Finish and packing: color, logo on faceplate or keys, set or bulk packing

Common Lock Problems

Problem	Likely cause	Fix
Lock body does not fit the profile	Wrong backset or case depth	Order by drawing, not by code alone
Key turns but bolt sticks	Keeper out of line	Adjust the keeper or door alignment
Cylinder sticks out or is too short	Cylinder length wrong for the door	Measure door thickness plus handle roses
Sliding door can be lifted open	Latch instead of hook lock	Fit a hook lock and matching keeper
Rust on faceplate	Plated steel in a wet area	Use stainless steel or a coated finish

Why buy from HIPAD

Locks, Handles and Hinges from One Factory

HIPAD has made door and window hardware since 2000. Lock bodies, hook locks, window locks and glass door locks are produced alongside our handles, hinges, rollers and window hardware, so a door or window factory can buy a matched set, in one finish, from one supplier.

25+years of manufacturing (since 2000)

30–80 mmdoor thickness range

2000+mold sets for fast customization

60+countries supplied

Quality control

Raw material checks of zinc alloy, steel and stainless steel
Dimensional checks of backset, centers and case against the drawing
Key operation, latch and bolt throw tested on samples from every batch
Surface finish inspection before packing

HIPAD is ISO 9001 certified, and applicable products carry CE, GS and CSA C-UL certification; certificates per model on request. SGS or BV third-party inspection is available.

OEM / ODM locks

Backset, case size and faceplate matched to your profile
Hook, latch, deadbolt and multipoint configurations
Cylinder type and key options
Laser logo on faceplate or keys, private-label packing, even for small quantities

1. Inquiry	Profile drawing or sample, lock type, finish
2. Samples	5–7 days for existing models
3. Production	20–25 working days
4. Shipment	FOB Qingdao or any China port · 30% deposit, 70% before shipment

Lock guides

More Guides on Door and Window Locks

Mortise Lock Body: Specification GuideCase, backset, centers and faceplate
Multipoint Door Lock: OEM Specification GuideGearbox, rods and locking points
Sliding Door Lock: OEM Selection GuideHook locks for aluminum sliding doors
Crescent Window Lock: Profile and Keeper GuideDimensions to record for a correct fit
Window Lock Manufacturer: OEM Selection GuideLock families and approval checks
Mortise Handle Set: Door Thickness GuideLever and lock sets by door thickness
Aluminum Door Handle with LockHandles that lock aluminum doors
Concealed Flush Bolts: Size and MaterialSecuring the fixed leaf of double doors

Door Lock Terms

Term	Meaning	Also called
Mortise lock	Lock whose case fits in a pocket in the door edge	Lock case, lock body, cerradura de embutir, fechadura de embutir
Backset	Door edge to the center of the handle or cylinder	Distancia de entrada
Centers	Handle spindle to cylinder center	Handle-to-cylinder distance
Hook lock	Sliding-door lock whose hook grips the keeper	Cerradura de gancho, chapa de gancho
Crescent lock	Rotating cam lock on sliding window meeting rails	Sash lock, cam lock
Multipoint lock	Lock with several locking points along the door edge	Multi-point lock, fechadura multiponto
Cylinder	Key-operated part that drives the bolt	Euro cylinder, lock core
Keeper	Part on the frame that the latch, bolt or hook engages	Strike plate

Door and Window Lock FAQ

What is a mortise lock?

A mortise lock is a lock whose body is fitted into a pocket cut into the door edge. The latch, the deadbolt or hook and the cylinder work from that one case, operated by a lever handle set and a key. It is stronger and neater than a surface-mounted lock.

What is backset on a door lock?

Backset is the distance from the door edge (the faceplate) to the center of the handle spindle or cylinder. Narrow aluminum doors need a short backset of about 25–35 mm; wooden and steel doors usually take 45–60 mm.

What do lock body codes like 3585 or 5572 mean?

They give the backset and the handle-to-cylinder centers in millimeters: 3585 is a 35 mm backset with 85 mm centers, and 5572 is a 55 mm backset with 72 mm centers. Case size and faceplate must still be checked against the door.

What lock is used on an aluminum sliding door?

Most aluminum sliding doors use a hook lock, whose hook grips a keeper on the frame so the door cannot be slid or lifted open. Flush locks with a key are used where a flat inside face is wanted.

Hook lock vs latch: what is the difference?

A latch springs into the frame when a hinged door closes. A hook lock swings a hook into a keeper and holds a sliding door against movement in both directions, which a latch cannot do.

What is a multipoint lock?

A multipoint lock locks the door at three or more points along its edge with one handle and cylinder. It is used on entrance and security doors, typically 40–80 mm thick, and pulls the door evenly against its seals.

How do you lock a frameless glass door?

With a glass door center lock that joins two glass leaves or a leaf to a fixed panel, or with a patch lock in the bottom patch fitting that bolts into the floor. HIPAD makes center locks HI-5003 to HI-5022 and patch fittings with lock.

Can you make locks to our profile and add our logo?

Yes. Send the profile drawing or a sample. We match backset, case and faceplate, set the hook or bolt configuration, and add your logo to the faceplate or keys with private-label packing, even for small quantities.

Is HIPAD a manufacturer or a trading company?

HIPAD is a manufacturer founded in 2000 in Qingdao, China, producing door and window hardware with its own molds and QC. HIPAD is ISO 9001 certified. Qingdao Hipad International Trade Co., Ltd. handles export.

Last updated: October 2026 · Reviewed by Allen, Technical Engineer, HIPAD

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Send Your Lock Requirements To HIPAD

Why Choose Us?

A door and window hardware factory since 2000, supplying door and window factories, profile system companies, distributors and contractors in 60+ countries. Our commitment includes:

ISO 9001 certified; CE, GS and CSA C-UL for applicable products; certificates per model on request
Mortise lock bodies, hook locks, glass door locks, multipoint and window locks from one factory
Samples in 5–7 days, mass production in 20–25 working days
OEM / ODM: profile matching, finishes, logo and packaging, even for small quantities

Send your profile drawing, lock type and finish. We reply within 24 hours with a matched lock and a factory price.

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