What is the little hole on a door lock for?
On the inside of that hole is a groove that will fit a small flat head screwdriver. Think of it as a very small screw that turns the lock. When you insert a small enough flat head screwdriver into this groove it will open your locked door.
What size hole is a door lock?
2 1/8″
The standard sized bore hole is 2 1/8″ in diameter. Through the edge of the door there is a 1″ cross bore that extends from the edge of the door through the bore hole. This cross bore is where the latch is installed.
Are all door lock holes the same size?
Standard Door Measurements The standard bore is 2-1/8”. Many older doors had bores that were been smaller. Most of the current locks require the standard 2-1/8” bore. If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
Are door handle holes universal?
Levers and handlesets usually need a hole 2 1/8 inches in diameter. If you’re shopping for replacement hardware, check the required backset. This is the distance from the edge of the door to the center of the bore hole. The most common are 2 3/8 inches and 2 3/4 inches, but some hardware can fit multiple backsets.
Do doorknobs have sizes?
To have the door function properly, you will have to make sure that the door knob you buy is the correct size for your door. The standard size for a door knob diameter is either 2 3/8 inches or 2 3/4 inches and these knobs will usually fit doors that are anywhere between 1 3/8 inches to 1 3/4 inches thick.
What size is a deadbolt hole?
Be sure to use the correct size drill bits specified in the lock set instructions, though most standard deadbolts require a 2 1/8-inch hole saw for the lock bodies and a 1-inch spade bit for the sliding bolt assembly.
Are there different size door locks?
In the United States, there are two common backsets for residential door locks: 2 3/8 inches and 2 3/4 inches. Pack your locks with a 2-3/8-inch or 2-3/4-inch latch, depending on which backset you specify.
Are door locks a standard size?
There are many different case depths but the most common sizes are 64mm and 76mm. This is the metric equivalent to 2.5″ and 3″ lock cases from back in the imperial days.