Easy to use drop in template design with clearly marked templates * Sturdy steel template frame with door thickness selector knob for 1-3/4 and 1-3/8-Inch doors * Includes durable tungsten carbide tipped router bit with ball bearing eliminating the need for guide bushings on your router * Centered tape measure tabs and easy measure guide ensure correct and precise installation of door hardware * Reusable packaging for template storage when not in use