KOPT Optimus Key info Bit width (E): 36.500mm Stem diameter (B): 8.000mm Bit length (D): 15.100mm Key length (A): 121.005mm
STE4R STE4R info Material: Nickel-plated brass Original producer: STEM (IT) Key length (A): 29.300mm Use: Kłódki 15mm Blade length (G): 12.150mm Blade width (H): 4.300mm Cuts: 3 cuts