Elaborate surface treatment with two nickel-plated layers and one chrome-plated layer, providing a skin-friendly surface. The key sizes are clearly legible. The ring side is angled at 15 degrees. The heads are polished, sleek, and thin-walled. The torque values are significantly higher, and the measurement inaccuracies are tighter than those specified by DIN/ISO. Each piece is calibrated and undergoes a final inspection, with each key having its own designated spot that clicks into a plastic base, which can also be wall-mounted. The holder features clear size markings.