An incredibly handy square designed for tool and die makers as welkl as woodowkring. Hardened precision ground blade and stock. The adjustable blade allows wider range of applications for checking quareness in places where conventional suqares cannot be used. This preciison sqaure comes complete wit ha straight blade, steel rule graduated both in metric and imperial. The blade locks securely in any position from full left to full right by an easy to operate knurled not on the stock.