This is a extremely handy lock jig can mortise the lock with a drill as opposed to a router, takes a little bit of getting used to but it works well once you get the hang of it I done 4 oak doors yesterday mortise and face plate in roughly 25 mins just be careful with the debt setting as it can slide making tou go deeper than needed I use a bit of tape to stop it from sliding, for the price you can't go wrong overall happy with it