Finally, new door lock and deadbolt installation is as easy as 1-2-3. Use this kit for easy installation on wood doors. This kit includes an EZ-Guide template, 2 High Carbon Steel (HCS) hole saws, and drill arbor with pilot drill bit. The kit also includes instructions on how to successfully install your new door lock or deadbolt. The patented template accommodates 1-3/8 in. and 1-3/4 in. door thicknesses. It also accommodates 2-3/8 in. and 2-3/4 in. knob and lock back-sets. No more ruined doors. Lock installation really is a DIY project.