Chain lock has 4-digit combination locking mechanisms for keyless convenience, 10,000 kinds of arrangement, password lock is more secure 12mm flexible braided steel cable for the highest cut resistance, and the PVC protective coating prevents the cable lock damage to your bike The cycling lock with novel shape, which is small and portable, ideal for bicycles, skateboards, gates & fences, grills & lawnmowers, sports equipment High-strength zinc alloy lock head, sturdy and durable, safe anti-theft, anti-corrosion and anti-rust, weather resistance, no worry of long term use The initial password of safty lock is 0000, we recommend that you change the password before the first use.Contact us if you have any problems, we will reply you within 24 hours