An impenetrably strong lock which conveniently attaches right to your bike. Solid, hardened-steel with drill protected rivets make bolt-cutters a non-issue.Key Features:Hardened steel linksIncreased security to protect your bikeUltra-Protected rivetsRivets are designed with the VSR technology against sawing or cuttingAnti-Drilling componentsCylinder and other components are drilling resistantProtected against the elementsMetal components are rust free and plastic cover is UV protectedBikes frame protectionLinks are plastic coated to prevent scratchesFast and easy to useEasy and convenient to operateSilent rideA rattle elimination mechanism prevents the lock from shaking while ridingEasy to carryFolds to a compact shape and is easily stored inside the frame mounted case