Why Is Backset Important?

What is backset and why is it important? Backset is the length from the center of the bore hole to the edge of the door. Knowing this distance is important because it determines the proper length of your door latch.

What is the most common backset?

Standard backsets are either a 2 3/8" backset, or 2 3/4″ backset. The most common backset is 2 3/8″ but 2 3/4" is also quite common - usually used on exterior doors. Sometimes it's easier to measure from the edge of the door to the highest point on the bore hole.

What does the backset mean?

The backset is the distance from the edge of the door to the spindle mechanism on the latch. Usually for a 63mm case measurement it will have a 44mm backset and for a 76mm case measurement will have a 65mm backset. The backset you choose is where your door knobs will sit on the door (where the spindle goes through).