NellyGear Replacement Mtb or Road Cycling Cleat Screws - SPD and SPD-SL Extra long (12mm) SPD-SL cleat bolts/screws for those shoes that require longer bolts (Sidi, Diadora, Specialized, Shimano, Lake, and others). Grade 316 stainless steel for optimal corrosion protection. 5M size SPD-SL: 3mm Hex, 9.5mm diameter head, Set of 6