Abstract: A lock installation kit for use in installing, into a door, a dead bolt lock, a lock set with a latch, or other similar types of locks. The kit includes a hole cutter which can drill a hole entirely through a side face of the door, the hole being of a size sufficient to receive therethrough either a doorknob mechanism in the case of a lock set, or a lock cylinder in the case of a dead bolt lock. A template is also included which can be positioned over an edge of the door for locating the hole on the door side face at a predetermined distance from the door edge. In the case of a lock set with a latch, the template also locates the center of the end face of the door, and the kit then includes a wood drill for drilling a hole in the end face of the door of the size sufficient to receive therethrough the latch of the lock set. The hole cutter and template, and also the wood drill in the case of the lock set, together with appropriate instructions, are all combined with a single package.