The HIT-45SL1 will make short work when installing Schlage L locks. All holes needed for cylinders, posts, spindles, etc., are located with hardened drill bushings. Larger holes are first located and drilled with a 1/4" diameter hole. This hole serves as a pilot for the correct size hole saw. All hole locations on the template are identified for use. Requires HIT-45 Clamp with HIT-45ML1 Locator.