Edelbrock part #9615 Valve Stem Locks are 7 Degree, hardened Steel with a 11/32" stem, standard height, machined and hardened replacement valve locks. Only machined and hardened valve locks are acceptable in Edelbrock applications. designed for use with Edelbrock retainers. 32 Qty Valve Stem Diameter (in): 0.342 in.Valve Stem Diameter (mm): 8.67mmLock Style: 7 degreeLock Groove Quantity: 1-grooveLock Material: Hardened steelManufacturing Process: MachinedRecessed for Lash Cap: YesQuantity: Sold as a set of 32.