Carbon Door Lock Installation Kit For Wood Doors, Completes Installation In 3 Easy Steps, Kit Includes: 2 Carbon Hole Saws With Arbors, A 2 Sided Self Centering Jig That Will Accommodate Both 2-3/8" Backset & 2-3/4" Backset, A Butt Hinge Template, A Router Guide & Router Bit For The Face Plate, 1 Piece Per Card.