The No Entry Door Lock Is Made Of 3/8 Inch Solid Steel. The Exterior Is "Powder Coated" To Prevent Cracking, Chipping Or Peeling. The Top And Bottom Feet Are 100% Virgin Rubber To Prevent Accidental Slippage On Any Surface During Forced Entry And Attempted Break In. Designed And Built To Last A Lifetime, The No Entry Will Give You Years Of Service Without Maintenance. Installation Is Simple And Fast. This Baby Locks Your Door From The Knob To The Floor! Perfect Security For Home, Garage, Apartment, College Dorm, Schools, Or Motel When Your Traveling Anywhere. No Other Lock Does What The No Entry Can Do!