Technology:\n- 8.5 mm steel shackle\n- The shackle, the case as well as supporting elements of the locking mechanism are made of special hardened steel\n- The KR (key retaining) version holds the key when the lock is open, the NKR (non key retaining) version allows taking it out of the cylinder\n\nTransport:\n- LH – Easy screwing to the threaded rear frame\n- Clutching Strap LH – For alternative mounting of frame locks to the bike frame (if no appliance in seatstay bridge available)\n\nTips:\n- Frame locks are a convenient protection against unauthorized use of the bicycle\n- The use of a second lock besides the frame lock is highly recommended\n- The NKR (non key retaining) version allows taking the key out of the cylinder when the lock is open