Bi-Metal Door Lock Installation Kit For Metal & Wood Doors, Completes Installation In 3 Easy Steps, Kit Includes: 2 Bi-Metal 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.