The RAM Track Ball consists of a B size 1" rubber ball molded to a high-strength composite base, a rubber friction washer, and a stainless-steel T-bolt for sliding into virtually any track system. Simply insert or slide the RAM Track Ball into your track and twist the ball clockwise to tighten in place. Twist counterclockwise to loosen or adjust the ball. Hardware Included (1) Friction Washer (1) 1/4"-20 x 7/8" T-Bolt T-Bolt Dimensions .48" x .95" Ball/Socket Size B Size (1") Weight Capacity 2 lbs Materials High strength composite Stainless steel Weight 0.1 lbs Features Designed for track mounting systems including the RAM Tough-Track; includes 1" B size rubber ball. Features a rubber friction washer and a stainless-steel T-bolt; simply insert into your track and twist the ball clockwise to tighten. Made of high-strength composites for durability and reliability in the most demanding environments Backed by a lifetime warranty.