Adjustable guide template for easy and exact drilling with snap lock (arms for selecting Door Width and Backset; Adjustable plastic guide template fits 1 – 3/8 inches and 1 3/4 inch thick doors, adjustable plastic guide template fits 2-3/8 inch and 2/3/4 inch backsets; Includes 1 inch and 2 1/8 inch carbon steel hole saws and a D Type Arbor with Pilot Drill