Kryptonite Keeper Chain Lock This robust chain lock has links with a thickness of 7 mm and is relatively light at 1.71 kg. The chain is directly connected to the locking cylinder, which ensures that there are fewer weak points for thieves. The locking cylinder is also protected against drilling or cracking. The nylon cover is durable and weatherproof and ensures that the frame of your bicycle is not damaged. Specifications: Color: black Chain material: steel Cover material: nylon Length: 120 cm Link thickness: 7 mm Weight: 1.71 kg Warranty: lifetime Contents: 1 Lock 2 Keys