Tuff Stuff, 90004, Bi Metal Hole Saw Door Lock Installation Kit for Metal & Wood Doors with Guide, Guide template for easy & exact drilling, For Steel & Wood Doors, Completes Installation In 3 Easy Steps, Kit Includes: 2 Bi Metal Hole Saws With Arbor, A 2 Sided Self Centering Jig That Will Accommodate Both 2-3/8" Backset & 2-3/4" Backset, For 1-3/8" & 1-3/4" thick doors, 1 Piece Per Card.