RAM® Track Ball™ Base with T-Bolt Attachment - C Size hummingbird A complete list of compatible

A complete list of compatible devices can be found below in the compatibility section

double socket arm and universal spring loaded X-Grip® cradle for cell phones

while peripheral support is provided by the built-in USB Type-A cable

this track base makes an excellent addition to the left side of your boat

RAM® Track Ball™ Base with T-Bolt Attachment - C Size hummingbird A complete list of compatibleThe RAM Track Ball is made up of a C size 1. 5" 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 Track Ball into your track and twist the ball clockwise to tighten in place. Twist counterclockwise to loosen or adjust the ball.