Vintage Doors can pre-drill your door for either a tubular or mortise lockset. Standard tubular lockset preps have a 2 1/8" diameter hole with either a 2 3/8" or 2 3/4" backset. Many entry door sets have what is called a "double bore" with two 2 1/8" diameter holes approximately 5 1/2" apart from each other on center which accommodate the latch and a deadbolt cylinder. Mortise pocket preps can also be done for you. All details are finalized prior to order.