Top mounts can be installed on a plate on the T-Top, hardtop or arch and can operate from underneath. The enhanced, ergonomic rotator handle adjusts to your desired position to avoid obstruction during operation and features a secure, heavy-duty grip for sure handling in rough seas. With 12 positive locking positions the multi-angular arm features strong stainless steel construction with optimum positions for fishing, lay down for bridges, storage, and trailering. Manufactured with durable anodized aluminum and stainless steel components and Delrin bushings, they are sealed to prevent water leaks. 1-1/2 in. ID base fits most 15 ft. and 18 ft. outriggers (including Lee's, Perko and Rupp ).