FPL custom profile cylinders are configured in the U.S. to your exact specifications, engineered for precision. They can be made in any offset size, down to the exact millimeter. Even cylinders ...

it mounts on top of it on the inside of your door, with the lock’s thumb turn (or key, in the case of a double-cylinder lock) fitting inside this groove. It’s a pretty ingenious idea that ...

Double-cylinder deadbolts (keyed ... The rectangular faceplate, recessed into the door, makes a stronger setup. The post How to Install a Deadbolt Lock appeared first on Family Handyman.