The Proxxon double-open-end wrench set has a designated place for each wrench: securely fitted into a plastic holder that can also be mounted on the wall. It features clear size markings. Order for good! The wrenches undergo an elaborate surface treatment (2x nickel-plated, 1x chrome-plated) with a skin-friendly finish. They come with permanent laser engraving and large, easily readable sizes in mm. The polished heads are slim and thin-walled. Nevertheless, the torque values are significantly higher than those required by DIN/ISO standards. Measurement tolerances are tighter than specified by DIN/ISO. Each piece is calibrated and undergoes final inspection. Fully usable for commercial purposes! Wrench sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19, and 20 x 22 mm. • 8-piece set, complete with holder • Permanent laser engraving with large and clearly readable sizes • Measurement tolerances and torque values are better than required by DIN/ISO.