KOPT Optimus Key info Bit width (E): 36.500mm Stem diameter (B): 8.000mm Bit length (D): 15.100mm Key length (A): 121.005mm
5HK1 5HK1 info Material: Brass Original producer: HK (DE) Stem diameter (B): 5.800mm Key length (A): 83.500mm
DB21 DB21 info Material: Steel Original producer: DOBLINA (DE) Key length (A): 44.850mm Blade length (G): 17.500mm Blade width (H): 6.600mm Cuts: 4 cuts