Ram mounts track ball w/ t-bolt attachment

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 SIZE: B Size (1"). WEIGHT CAPACITY: Standard Use: 2 lbs, Heavy-Duty Use: 1 lb.