Cleat Set Shimano SM-SH51 SPD Single ReleaseCleat Set Shimano SM SH51 SPD Single Release Features: For SPD, single direction release type Release the cleats from the pedals by twisting your heels outward With cleat nut specification Cold forged and specially heat treated to increase durability and rigidity for heavy use even under severe conditions SPD cleats are engineered specifically to match SHIMANO pedals and avoid damage