Lezyne crv 12 multi toolcrv tools are functional lightweight and durable tools ideal for roadside or trail side use the forged aluminum side plates are lightweight and easy to use while wearing gloves the chrome vanadium bits and fastening hardware are nickel plated forged center pivot bits increase tool rigidity and improve ergonomics a cast steel chain breaker works with 910 speed chains crv 12 20 and has 3 integrated spoke wrenches features 2 3 4 5 6 8mm allen keys star shaped t25