Door Hardware Terminology: Backset, Diameter, Cropping, Striker Plate, Latch
When installing or replacing interior doors, understanding key door hardware terms can make the process easier. Whether you’re working with a builder, locksmith, or handling a DIY project, knowing these terms ensures you choose the right hardware for your needs. Below, we’ll break down the essential terminology used in door hardware installation.

Cropping
Cropping refers to cutting or preparing a door for hardware installation. This includes drilling holes, cutting recesses, and creating spaces for components like locks, latches, and striker plates. Cropping ensures a precise fit for hardware and is typically done using jigs or templates to maintain consistency. Accurate cropping is crucial to ensure the door operates smoothly and securely.

Diameter
Diameter refers to the size of the hole drilled through the door for the latch or lock body. This measurement is essential for selecting the right door hardware, as different locks and handles require specific hole sizes. Standard diameters are typically 48mm or 54mm, depending on the type of hardware being installed.

Backset
The backset is the distance from the edge of the door to the centre of the hole drilled for the latch or lock mechanism. Common backset measurements include 60mm and 70mm, but this can vary based on door type and hardware specifications. Choosing the correct backset ensures the handle or knob is positioned comfortably and aligns correctly with the door frame.

Latch
A latch is the mechanism that holds the door closed without locking it. It consists of a spring-loaded bolt that retracts when the handle or knob is turned. Latches come in different types, such as tubular latches, mortice latches, and roller latches, each suited for different door styles and applications.

Striker Plate
The striker plate (or strike plate) is a metal plate installed on the door frame where the latch engages. It reinforces the area around the latch hole, providing durability and preventing wear from repeated use. Striker plates come in various shapes and finishes, often tailored to different latch and lock types.
Which Door Handle Set Is Right for You?
Understanding these key door hardware terms helps ensure a smooth installation process and proper door function. Whether you’re upgrading existing hardware or fitting a new door, knowing the right terminology makes ensures you’ll get the right hardware fitting for your doors.