Bounce Angle: 09 degrees (The degree to which the sole bounces back. 9 degrees is classified as "Low to Mid Bounce" and is suitable for hard ground, bunkers with little sand, or for players who like to open the clubface.) Key Features: • Spin Milled: As the name "SM4" suggests, the grooves are precisely milled to sharpen the groove edges and increase smoothness. This model pursued the maximum spin performance within the rules at the time. I used this wedge a lot for practice and rounds back then, so it shows signs of use.