Use with the Included Original QUICK FIST clamp #10010 to mount a flashlight, shovel, axe, high lift jack or other tools from 1" to 2.25" (25 to 57mm) in diameter to a roll bar. The safe working load for two QUICK FIST Roll Bar Mounts on roll bars less than 1.5" in diameter is 50lbs. Roll bars 1.5" in diameter or larger, the safe working load is 100lbs. Fits all roll bars from 1" to 2.5" (25 to 64mm) in diameter