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The backset is the distance from the edge of the door to the center of the 2-1/8" bore hole. In the U.S. there are two common backsets for residential locks, 2-3/8" and 2-3/4".


Center-to-center Dimension (Cabinets)

For products like cabinet pulls or grips, the measurement between two attachment points.

Center to center cabinet dimension

Center-to-center Dimension (Doors)

The distance between the center of the bore for the handle and the center of the bore for the deadbolt. Standard Dimensions are either 5-1/2" or 3-5/8"

Double Cylinder

A deadbolt featuring a key way on the exterior as well as a key way on the interior.

Dummy Function

FULL:  This is a set with inoperable handles on both sides of the door

SINGLE: This is a set with an inoperable handle on one side of the door

(typically in conjunction with roller catches, flush bolts or surface bolts).


A flat piece of metal for protection and often ornamentation, around a keyhole, door handle, or light switch.


Handing refers to the swing of the door. This determines whether your door is a right-hand or left-hand door.


A handle set without an internal locking mechanism. A passage set is used on a door that doesn't require privacy, for example; between a living room and a kitchen or closet.


A handle set with a locking mechanism.


The furthest distance and object extends off of a surface, like a door or cabinet.

Single Cylinder

A deadbolt featuring a key way on the exterior and thumb turn on the interior.

Standard Tubular Door Prep

The dimensions that a door must be bored or mortised in order for a handle set to be installed.
Standard Tubular Door Prep

Strike Plate

The metal plate installed on the door jamb that receives the latch bolt when the door is closed.


Thumb Turn

The turn piece located on the inside trim of a deadbolt that engages/disengages the latch mechanism.