You are buying Proform 66788 Valve Lash Adjusting Wrench Set. Wrench Size: 1/2″ T-Handle Size: 3/16″ & 1/8″ This set is works on Rocker Arm Adjuster nut size 1/2″ wrench and either 3/16″ or 1/8″ allen set screw Part# 66788 This simple T-handle and wrench set makes adjustment very easy, cutting the adjusting time in half. Simply position the adjusting handle wrench over the rocker arm lock-down (make sure you have purchased the set with the proper sized wrench), and drop the appropriate T-handle down through the hole in the wrench – with one hand doing the job of two! Then make the lash adjustment with a feeler gauge according to the camshaft manufacturer’s specifications. Brand New in Box International shipping PLEASE NOTE: Import duties and taxes are not included in this price. These charges are the buyer’s responsibility. We do not mark merchandise values below value or mark items as “gifts” –