I just took a a piece of steel around 1/4" or 3/16" steel I would have to dig it out and measure it and a countersunk bolt and a couple of hardened pins I put a inside radius on the steel so it fits around the nut that tightens the pulley and the countersunk bolt goes in the main body of the tool and I have a 9/16" nut so I can use one of my 3/8" drive torque wrenches and a 1/4" drive torque wrench use it on the tool and it works really well every once in a while replace the pins I have been using that tool for years now it works perfectly. If anybody is interested I will get my old behind up and take some pictures and some dimensions if anyone cares.