Bi-Metal Hole Saws For Metal And Wood DoorsFits All Interior And Exterior DoorsSelf Centering Jig Fits All Common Door WidthsAdjustable For Both 2-3/8" And 2-3/4" BacksetsIncludes Bolt Plate Template, Hinge Plated Template, Double Sided Jig, 1" Hole Saw, 2-1/8" Hole Saw, 3/8" Mandrel And A Custom Router BitComplete Installation In 3 Easy Steps