A surgical tool designed for overdrilling, gripping, and extracting an implanted surgical screw shaft when the screw head has become defective or detached, or the shaft has broken. It is in the form of a thin hollow metal shaft, with saw teeth at the cutting edge and a conical thread within the lumen. The device is rotated around the screw shaft to remove a thin layer of bone, either by a surgical power tool or a manual handle, until the internal thread grips the screw for removal. This is a single-use device.