The Proxxon ring spanner set comes in a practical and hangable tool bag that features clear size markings. It has an elaborate surface treatment with two layers of nickel plating and one layer of chrome plating, providing a skin-friendly surface. The durable laser engraving displays large, easily readable spanner sizes in millimeters. The polished heads are slim and thin-walled, yet the torque values exceed the requirements of DIN/ISO. The dimensional tolerances are tighter than those specified by DIN/ISO. Each piece is calibrated and undergoes a final inspection, making it fully suitable for commercial use. This 12-piece set includes spanners in sizes 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, and 19 mm, all stored in a foldable bag. The ring spanner side is angled at 15 degrees, and the dimensional tolerances as well as the torque values are better than those required by DIN/ISO.