"Size: 60 mm; Material: brass. Angular measures are designed to control and calibrate goniometers and angle gauges, as well as to check the angles of products. Angular measures are presented with holes for attaching devices that tighten the tiles into blocks and have a sharp top of the working angle.The nominal size of the working angles of the tile is from 15 ° to 30 °. Own production. RUSSIAN FEDERATION"