*Valve Lash Adjustment Torque Wrench* The Valve Lash Adjustment Torque Wrench is a combination precision torque wrench and valve adjustment tool. This exceptional tool simplifies making precise valve lash settings by properly torquing adjuster nuts every time. * One tool works for all “shaft” style rocker arms * Accepts any standard 3/8" drive socket (not included) * Comes with 1/8", 5/32" and 3/16" hex keys *EZ Valve Lash Wrenches* You no longer need three hands to adjust valves – you just need the right tool. COMP Cams EZ Valve Lash Wrenches make valve adjustment easier and quicker than ever. * Constructed of 17-4 stainless steel * Heat-treated and electropolished to satin finish * Offer sizes for most popular polylock & set screw combinations PartNumber : cca530-1 Description : EZ Valve Lash Wrench Title : 5301 Wrench, EZ Valve Lash 5/16" California Proposition 65 : WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects or other reproductive harm. Seal Outer Diameter : 0.565 Valve Guide Outer Diameter : 0.425 Valve Seal Type : Black Viton Valve Stem Outer Diameter : 5/16 Valve Size : 5/16" / .566" Guide Size : .425" Size : 5/8" Wrench w/ 3/16" & 7/32" T-Handle Engine Components::Valve Seals