SlimLine double ring wrench set, 8 pieces, complete with holder. According to DIN 838 and ISO 3318. Elaborate surface treatment (2x nickel-plated, 1x chrome-plated) with a skin-friendly finish. Featuring permanent laser engraving and large, clearly readable sizes in mm. Polished heads, slim and thin-walled. Nevertheless, the torque values are significantly higher than required by DIN/ISO. Measurement tolerances are tighter than specified by DIN/ISO. Each piece is calibrated and undergoes final inspection. 10-year warranty! 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. Note: Each wrench has its designated place: securely fitted in a plastic base that can also be mounted on the wall. With clear size markings. Order for a lifetime! Material: Chrome vanadium steel (2x nickel-plated, 1x chrome-plated).