The Go-Between QUICK FIST clamp holds tools and equipment from 1 " to 2 7/8" (44 to 73mm) in diameter. This clamp will securely hold an implement up to a safe working load of 35lbs (16 kilos). The break strength is 100 lbs or 45 kilos. Two Go-Between QUICK FIST clamps can be mounted back to back and then used to hold an item to a roll bar (for safety, keep the mount down low-certainly, not above the front seat height). This clamp is also great for securing poles and awning struts too large for the Original QUICK FIST clamp.