This RAM® iPad Track Mount (RAM-HOL-AP23-354-TRA1U) is made up of a C size 1.5" ball molded to a high-strength composite base, a rubber friction washer and a stainless steel T-bolt for sliding into any third-party track system, or the RAM® Tough-Track™ line of tracks. 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. Included in this kit is a C-sized medium length socket arm and a form-fit cradle for the iPad Pro 11" (1st-4th Gen), Air 4, 5, & Air 11 (M2 & M3) providing a perfect fit for your iPad without a case.