At 340 grams, the additional head weight provides you with that "Rock Steady" grooved pendulum swing path necessary for a consistent "chip-and-run" technique around the greens. Featured in its design is the System Q dual Wight Port that incorporates a 6 grams weight screw in the heel and toe ports to increase stability through the stroke. Additional 2 and 4 gram screws may be interchanged in the ports to fine tune the proper feel for your individual game. The System Q Chipper is a welcome member to the System Q family of products. Uses a standard .370" iron or putter shaft (putter grips are not recommended as this would make the club non-conforming to the Rules of Golf).