BLACK DIAMOND Serac Crampon 5" high 5" wide New and improved stainless steel construction is stronger, resists snowballing and is rust proof. Versatile horizontal front-points with classic secondary points and stable rear points. Low-profile micro-adjust heel bail offers custom fit. Pro version is for technical boots; Clip version is for mountain boots without a toe welt; Strap version is for non-technical footwear. Includes front and rear dual-density ABS.