Manfrotto 327RC2 Light Grip Joystick Tripod Ball Head with Two Replacement Quick Release Plates for the RC2 Rapid Connect Adapter Friction control permits fine framing adjustment and improved camera safety Stainless steel ball made using a "deep drawing" process which produces a strong, thin-walled, hollow sphere, reducing weight and increasing locking power Ergonomic design guarantees comfort and precision Extremely lightweight but also extremely secure fixing of steel ball combined with low weight Two Bonus Replacement Quick Release Plates for the RC2 Rapid Connect Adapter