COMP Cams Valve Locks 617-100 Ideal for use in race applications, our wider 10 degree angle locks better distribute increasing spring loads over the retainer more than typicaly 7 degree locks. Set of 100 - 10 Degree, .310", Single Groove Locks w/o Lash Cap Recess 617-100 - SUper Valve Locks, EB 5/16" w/o Recess COMP Cams Super Valve Locks Eb 5/16in