This toe-in bar is simple and easy to use - slide the rod against the tire, then measure toe to within 1/16", Can easily be done by one person - this new design measures to the outside of the tires - no scribe line needed, Adjustable up to 88" in width - this toe-in bar from Longacre is great for wide track cars, Features small wheels on the bar that allow it to slide under the car easily, Built to last, this toe-in gauge is constructed of strong billet aluminum.