Wider angle (10°) locks to better distribute the ever increasing valve spring loads over the retainer than typical 7° locks (see drawing), reducing the chance of "pull-through" failure. Precision machined rather than stamped for the ultimate in accuracySuper-tough, fatigue resistant alloy materialInside tang to taper relationship held tightly for repeatable valve spring installed heightsAvailable for many popular valve sizes with & without lash cap recessAlso available in +. 050" installed height versionsFor simplicity, any Super Lock? fits any COMP Cams® 10° retainer, just choose the correct lock for your valve size and applicationSuper Locks? are recommended in all race applications because of their superior strengthPit Stop USA offers Comp Cams 10° Super Locks™ w/ Lash Cap Recess - .310" - (Set of 16) 617-16 at low everyday prices. Be sure to check out all of our products from Comp Cams including Comp Cams 10 Degree Valve Locks.