Shown here is our 10 degree "Super Lock" Steel Retainers. These are a huge, extremely beefy valve retainer which is designed to fit our 145-1002 ten degree "Super Locks," which can be found on our Valve Locks page. This 10 degree lock & retainer system has a wider angle of interference than a standard 7 degree lock. These are fully machined from 4140 Chrome Moly and finished in black oxide. Most major cam manufacurers recommend going to a 10 degree setup for extra insurance with any cams over .460" lift, and it is generally considered mandatory for any cams using a dual valve spring setup and/or over .510" lift. We highly recommend upgrading to these for extra insurance. These are supplied in a set of 16, enough to do one complete engine.