Read the instructions that come with the lock set carefully before installing a new lock set:
Step 1: Position the lockset template on the door.
Step 2: Use a nail or an awl to mark the centre points of the cylinder and the latch bolt hole.
Step 3: Use a hole saw and a drill to bore the hole.
Step 4: Bore the latch bolt hole with a spade bit on the side of the door.
Step 5: Insert the latch bolt into the side hole.
Step 6: Assemble the cylinder with the latch bolt.
Step 7: Score the outline of the strike plate on the doorframe with a utility knife.
Step 8: Chisel the outline of the strike plate mortise.
Step 9: Make a series of parallel cuts 1/4” apart.
Step 10: Drive the chisel into the wood by lightly tapping the chisel end with a hammer.
Step 11: Point the chisel down to lever out the waste gently.
Step 12: Secure the strike plate to the mortise.