HELIOS PREISSER Measurement Tools Engineer's square without stop 630910 - Helios Preisser 0375404, The HELIOS PREISSER Engineer's square, model 0375404, is designed without a stop and measures 100 x 70 mm at precisely 90 degrees. This tool is ideal for ensuring accurate right angles in metalworking and woodworking projects. Typically used by engineers and craftsmen, it is essential for precision layout, measuring, and verification tasks. HELIOS PREISSER 0375404 Engineers Square 100x70mm 90° For Angle Tests