What is the back of?

The term backset is used to describe the location of the lock in relation to the edge of the door. This dimension is used for all types of blocking devices, including cylindrical locks and locks, as well as for dead sets and handles. While some locations are relatively standard, they may vary depending on the hardware, manufacturer and region design. Since most locks are installed via the circular holes drilled in the door, it can be used as a reference point when measuring the back. This measurement should never be carried out from the edge of the lock and should always be carried out from the center of the handle or lock. Door manufacturers need this measurement to be able to properly drill holes in the door to adapt the locks. Most locks are made to work with only one backset dimension. If the dimensions of the lock do not correspond to those needed for the door, the screw will either be extended too far beyond the door edge, or will not extend far enough. In one of these scenarios will not be the doorto lock properly.

In the US and Canada, two standard dimensions are used. Most commercial doors have a rear part of 2-3/4 inches (69.8 mm), while the residential door measures 2-3/8 inches (60.3 mm). In the UK and most of Europe, these dimensions may differ from 25 to 60 mm and many buttons of the medallion are placed in the center of the door and creates a very large basis. Many aluminum doors are known for its narrow stiles, which can be as small as 1 inch (25 mm). Because Stil on these doors is so narrow, they also have a relatively small base, often measured in millimeters because it is so small.

Some modern locks of interchangeable floors. These locks have a switch or setting of some kind that can shorten or extend the screw to fit in different sizes of the door. This change is generally easy to make and can be done manually without the use of special tools. This type of function is not common, so in the caseDaying locks should be carefully considered to ensure that it fits in the door.