Disc brake rotor straightener - to gently straighten mountain bike disc brake rotors - 2 slots depths: one long for bent brake rotors at rotor arm and one short for those bent at the braking area - high-precision laser cut - hardened tool quality steel - comfortable handle As bent or damaged disc brake rotors are often due to misaligned disc brake calipers to Wheel hubs, we advise you to use tool CD-14000