Chain Lock Kryptonite KryptoFlex 710 Looped The need for security varies depending on the situation. Where you park your bike and how long you leave it unattended are the primary factors that affect the required level of security. This overview lets you choose the level of security that best suits your needs. For more information, click the appropriate security level. Kryptonite recommends investing 10% of the total value of your bike in security products. We also recommend using two locks instead of one. This scares most bike thieves and makes them look for easier prey. Facts 10 mm thick, hexagonal chain links made of extra hard 3t manganese steel Weatherproof nylon cover protects your bike from scratches and allows a compact collapse of the chain Including 3 "i" Keys made of sturdy stainless steel. A key with integrated LED key illumination Reinforced high-security disc cylinder lock secured against picking and drilling Evolution Series 4 locking head Security level: 8/10 Length: 55cm Weight: 2.00 kg