•Bi-directional design for removing or tightening damaged fasteners •Tapered entry enables insert to easily seat on a damaged fastener •Designed to work with a static, ratcheting, or open-end wrench for ultimate versatility •Hex base compatible with 6-point, 12 point and spline wrenches •Ultra-thin design, 70% thinner than traditional extraction tools •Magnetic retention system for secure fit inside of wrench •Dual sized inserts designed to work with both SAE and Metric fasteners