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FE575/FE595 Door Preparation Instructions For Door With No Holes Tools Needed 2¹⁄₈” Hole Saw Drill Bits Needed: Pencil Chisel ¹⁄₈”, ⁷⁄₈”, 1” Mark and Drill Hole in Door Edge Measure Door Width If the door is thinner than 1³⁄₈” or thicker than 1³⁄₄”, then the lock will not fit properly on the door.