3. Quick Fist Super

QUICK FIST Clamps Make It Easy to Mount Tools And Equipment On Your Vehicle. Holds objects 2 1/2" to 9 1/2" (64mm to 240mm) in diameter. Mounting base measures 6" x 7/8" (152 x 22mm). Attaches easily with 3 # 10 bolts or screws (not provided). One clamp supports a safe working load of 50 lbs. (23 kilos).