I was hoping for one because of the door I'm trying to put this into. Were it wood, it would be easier. New door, unfortunately already drilled out for a modern knob/bolt set. I have to first fill holes, then redrill. Makes it hard to chisel.uh, in the middle of a set of mortise bits from Jet, Delta, irwin... or just the 5/8's from any woodworking supply house. Though the only thing you need is a 5/8's bit and a chisel for the way the old timers did them. saves all that pesky setting up the mortising machine or drill press to take a door blank.