This ball connects to the open hole on the side of the RAM-B-309-1 (single 1'' ball) that fits most motorcycle's master cylinder clamps. Item can also be installed on any 6mm-diameter hole.

Compatible with RAM-B-309-1 base:
The RAM-B-309-1 clutch/brake motorcycle base connect to your handlebar clutch/brake clamp, left or right side, and holds one or two 1'' diameter mounting balls. The base fits the control clamps on your motorcycle with 40mm x 6mm stainless steel hardware, provided in the kit.