This long RAM MOUNTS X-Grip Large Phone Mount with Track Ball Base consists of a B-size 1' 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 it in place. Twist counterclockwise to loosen or adjust the ball. Included in this kit are a B-size long-length socket arm and a RAM X-Grip for large-size phones with or without a case.