Convenient and easy to use, our Thread Checker saves you the time and hassle of estimating the size of the nut or bolt you need. Get the job done right-the first time-with this handy tool. Product Features:For standard and metric measurementsChecks male and female threadsMounted on a long, durable cable with looped end for repeated use and simple storage on the wall or in a drawerPerfect for use in the repair shop, at home, in the garage, and many other places