Effortlessly remove seized or corroded nuts from 11 - 89 mm Dia., featured with a Triangular Chisel with three cutting edges; Rear-end connection for safe and ease handling, without damaging stud / bolt threads. Light and compact design for ease of operation and handling. Removes Corroded Nuts Faster Removes Frozen Nuts Safely Fits Tight Spaces Cuts through the Hardest Nuts Triangular Chisel providing three cutting edges. Rear end connection for ease of handling and safe-connection . Laser marked for easy setting. Calibrated system. No damage to stud / bolt threads.