Tell Manufacturing’s Finishing Touches Deadbolts are a professional grade residential hardware. These deadbolts, both single cylinder and double cylinder, are all steel construction with no plastic parts to wear out or break. The DB3000 series deadbolts are available in a variety of finishes and has a lifetime mechanical warranty. These deadbolts will work on doors 1-3/8″ to 1-3/4″ thick, with an adjustable backset for quick and easy installation. The Finishing Touches line offers a quality lock at a competitive price, that is great for your exterior and interior needs.