RAM® Aluminum Track Ball Base with T-Bolt Attachment - C Size RAM-299-SBU The RAM-B-101U-A-AAR1 consists of a

The RAM-B-101U-A-AAR1 consists of a short length B-size arm with two 1/4"-20 female threaded tough balls

Thread length is

Included is a short length C size double socket arm

The RAM-235-1U consists of a double u-bolt base with 1

31" diamond plate

RAM® Aluminum Track Ball Base with T-Bolt Attachment - C Size RAM-299-SBU The RAM-B-101U-A-AAR1 consists of aThe RAM Track Ball is made up of a C size 1. 5" ball molded to a marine grade aluminum base, a rubber friction washer and a stainless steel T bolt for sliding into virtually any track system. Simply insert or slide the Track Ball into your track and twist the ball clockwise to tighten in place. Twist counterclockwise to loosen or adjust the ball.