Super Quick Fist Clamp - Cylinder Clamp - End of the Road, Inc. 2 clamps support 100lbs (45 kilos). Mounts with three #10 bolts or screws. Mounting area: 6" x 7/8" (152 x 22mm). One clamp per package. Holds objects from 2.5" to 9.5" (64 to 240mm) in diameter