Combi-Bolt offers convenient keyless security with 10,000 possible combinations and no need to hassle with keys. The solid, beefy all metal sliding bolt (3/8" diameter) provides the convenience of one locking device and is more secure than hasp-and-padlock designs with exposed shackles. Combi-Bolt is perfect for child proofing your home. With 10,000 possible combinations and 1-way security screws, it's easy to install anywhere in minutes. Secure doors, windows, gates, tool sheds, power tools and guns.