Elaborate surface treatment with two nickel-plated layers and one chrome-plated layer, featuring a skin-friendly finish. Clearly legible wrench sizes are provided. The ring side is angled by 15 degrees. The heads are polished, slim, and thin-walled. Torque values are significantly higher, and measuring tolerances are narrower than those specified by DIN/ISO. Each piece is calibrated and undergoes final checks, with each key having its own fixed place, latched into a plastic base that can also be mounted on the wall. The holder includes clear size markings.