The RAM Tough-Claw is the perfect mounting base for quick and easy tool-less installation and removal on round, square, odd shaped rails, and bars. Can be converted into the most versatile mounting option for motor stabilizers. Simply tighten the grip of the Tough-Claw attached to the motor stabilizer and attach the drill-down base to the most effective location on the vessel to achieve the perfect mount. Ball size: 1-1/2″ – C Size. Strap hose clamp. Clamp range: 1″ – 2.1″. Medium arm.