This refers to a feature offered by some, but not all, safes and lockboxes. Standards for Burglar-resistive ratings are established by the insurance industry and by safe manufactures themselves. Just because a box has a lock on it doesn’t mean that it will protect your valuables. A professional locksmith can educate you and help you select a product that will protect your property adequately.Backset
This refers to the measurement from the edge of the door to the center of the main bore of an installed lock. To obtain this measurement, hook a measuring tape on the edge of the door and measure right to center of the keyhole. The most common backset for modern residential-grade locks is 2-3/8". The standard backset for commercial-grade locksets is 2-3/4." If you are buying a replacement lock, this is the most important dimension to match.Bored Lock
see Cylindrical Lock, belowBurglar-proof
There is no such thing! See Burglar-resistive.Bow
(with a long O sound) This is the technical term for the handle part of all keys.