Bicycle lock KRYPTONITE chain KEEPER 790 7x900mm Black - combination lock chain with protection on the Kryptonite scale: 5 out of 10. Quadrangular 7-mm steel links, length 90 cm, weight 1.7 kg. 4-digit individual code set. The Kryptonite lock chain is tucked into a padded sleeve to prevent damage to the frame. Always check the object to which the fixation is being made (parking pipe, railings, fence element, etc.).