The Ultimate In Strength and Wear Resistance! These Locks Are Machined From Highest Quality Alloy Steel Billet Material Using The Finest Swiss-Built, Automatic Screw Machines and Then Carefully Heat Treated. Engineered Specifically For Today's High Engine Speeds and High-Tension Valve Springs. These Machined Steel Locks Are The Only Locks To Be Used With Our Posi-Lock Valve Spring Retainers. Oxide Finished For Corrosion Protection. Note: Crane Locks Are Color Coded For Easier Identification.Pit Stop USA offers Crane Cams 7° Valve Stem Locks - Single Groove - 11/32" Valve Diameter, +.050" Install Height 99095-1 at low everyday prices. Be sure to check out all of our products from Crane Cams including Crane Cams 7 Degree Valve Locks.