Edelbrock part #9611 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. 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: NoQuantity: Sold as a set of 32