Granite fastening bracket

The Black granite squares are designed for accurate squareness testing, and offer excellent performance, due to low tolerances and highly stable base. The larger versions are designed with holes in order to reduce weight and simplify transportation. These units feature a lateral face tolerance of ± 20 μm/m and are divided in two precision grades, for laboratories and workshops. They are supplied with the original test report and primary instrument reference and are available with a wooden case, per customer request.