The Phoenix pro grenade SCS quad clamp is a light weight 4-bolt clamp for Standard Compression System (SCS). The Phoenix Grenade SCS clamp is made from 6061 T6 CNC aluminum (strong and light weight) in the shape of a grenade made right hear in the USA!!! It meassures in at 3½ inches long with an inside diameter of 1 ½ inches. Only compatible with standard sized bars and 1 1/8 inch threadless forks. Comes in colors: Black, Blue, Titanium, Green, and Violet. Truely a one of a kind looking SCS clamp!