Cleveland Golf CG15 Oil Quench Tour Zip Wedge (2011 Model, Low Bounce) Laser Milled: More precise and consistent surface roughness application than alternative methods to optimize spin. Tour Zip Grooves: Breakthrough milling technology creates pristine edges to increase spin and shot consistency. Conforms to 2010 USGA groove rule. S Sole: Wider sole width near the heel, narrower sole width near the toe improves bunker performance without sacrificing versatility.