The new "Rod Ruler" fro Coleman makes measuring your tie rods, trailing arms, upper third links and other linkages with rod ends simple and quick. It wil measure 5/16", 3/8", 7/16", 1/2", 5/8" and 3/4" rod ends all with one tool. Save valuable time at the track by setting up all your linkages including your spares ahead of time. No more fumbling with tape measures and trying to guess the center to center distance. With the "Rod Ruler" there is no guessing, the stepped boss automatically aligns the rod ends on center. This unit is also capable of measuring linkages with springs up to 5-1/2" diameter such as torque absorbers. Measures up to 36" long linkages.Pit Stop USA offers Coleman Rod Ruler 21790 at low everyday prices. Be sure to check out all of our products from Coleman Racing Products including Coleman Racing Products Radius Rod Builders and Coleman Racing Products Rod Builders and Rulers and Coleman Racing Products Rod Rulers and Builders.