Quick Fist holds objects 1-inch to 1-3/4-inches (25 millimeters to 45 millimeters) in diameter. Mounts easily to keep shovels, axes, hoses and other tools or implements securely in place. Use on work vehicles, trailers, fire and police units, off road trucks, military equipment, 4x4s, ATVs, RVs, boats or on any wall. Each clamp supports a safe working load of 25 pounds (11 kilos). 2 clamps support 50 pounds (23 kilos). Mounts easily with one #10 bolt or screw. Mounting area: 2-1/2-inches x 3/4-inch (64 x 19 millimeters). Quick Fist can also be used as a pipe stand-off (particularly suited for marine applications). Do not use on exhaust pipes.