Horizontal Mortise Lock

A rim lock is the oldest type of locking device for a door. Its basic design includes a surface-mounted box containing a deadbolt type of lock and a latch. Rim locks are easy to install because they are fixed on the surface of the door instead of being mortice-set into the edge.

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Description

What Is a Rim Lock? A Classic Door Lock with Timeless Appeal

A rim lock is one of the oldest door lock designs still in use today. Unlike a Horizontal Mortise Lock or a modern mortice system that is embedded into the door edge, a rim lock is a surface-mounted box containing both a latch and a deadbolt. Because it is mounted on the face of the door instead of cut inside it, installation is simple and requires minimal carpentry-making it a practical choice for homeowners seeking convenience and traditional charm.

Historical Background

Rim locks date back to the Middle Ages. By the Renaissance era, they evolved into decorative features, often embellished with detailed metalwork. Most rim locks used today follow Victorian-era designs, featuring black or brass cases that complement vintage interiors. While a Victorian horizontal mortise lock offers a more integrated, in-door installation, rim locks remain a beloved alternative for achieving an authentic period look.

Product introduction

Product specification

Material: Steel	Surface treatment: Black plated
Body thickness: 2mm	Square bolt/latch: steel and zinc plated
Square hole: 6*6mm	Screws: 4pcs M440mm; 4pcs M425mm; 8pcs M3*12mm

When to Choose a Rim Lock

Rim locks are especially suitable for:

Period, Victorian, or heritage-style homes
Doors that are too thin to accommodate a horizontal mortice lock
Interior doors requiring privacy, such as bedrooms or studies
Decorative restoration projects where maintaining authenticity is important

Because rim locks sit on the front surface of the door, they are commonly used on older or smaller doors-often found in historic cottages, small villas, or traditional pine and oak interiors-where a Victorian horizontal mortise lock cannot be fitted due to limited thickness.

Important Safety Note

Rim locks are not suitable for exterior doors. Since they are surface-mounted, they can be removed more easily than an embedded Horizontal Mortise Lock. If you plan to use a rim lock on an outside door, consult your home insurance provider for recommendations on additional security hardware or secondary locking systems.

Installation Advantages

Quick and easy to install
No need to cut a mortice slot
Ideal for thin wooden doors
Enhances traditional and vintage aesthetics

For homeowners who appreciate period craftsmanship but want easier installation than a horizontal mortice lock, a rim lock offers the perfect balance.

Company Introduction – BS International Company Limited

BS International Company Limited specializes in a wide range of hardware products, including padlocks, door locks, Horizontal Mortise Lock designs, door handles, cylinders, and more.

Founded in 1996, we have over two decades of manufacturing and export experience, proudly cooperating with customers across Europe, America, the Middle East, and many other regions worldwide. Our commitment to quality, reliability, and product innovation has earned us long-term trust in the global hardware market.