Material: Tungsten Carbide Length: Approximately 2 x 6.2 cm / 0.79 x 2.44 inches How to use: The initial password is 000 (three zeros), but users can set a different 3-character combination as desired. To change the password: 1. Press the action button while holding the position. 2. Rotate the wheel to set your personal character combination. 3. Release the button, and the combination is closed. The password has been successfully set. Notes: 1. Due to differences in monitors and lighting effects, the actual color of the item may differ slightly from the color shown in the pictures. 2. All products are new, but there may be some minor scratches. Please understand.