Product Description Hardware Essentials Barrel Bolts are designed so the bolt fits snug into the chamber reducing risk of mount loosening. They feature a stylish design that adds an extra touch to your single or double-hung window. These barrel bolts use #7 screws for additional strength and security. Ideal for doors, sheds, gates and more. Use for right or left side applications. Tools required: marking pencil, power drill, 1/16" drill bit, and a handheld screwdriver. Easy to install and all mounting hardware is included. From the Manufacturer Barrel Bolts are designed for security applications on lightweight doors, chest, cabinets, etc. and can be mounted vertically or horizontally. They can be used for right or left hand applications. Includes mounting hardware.