Pro-Grabit works on damaged screws and broken bolts without and center punching or preparation. One end is a self-centering left-handed drill, and the other is a high torque extractor. #4 bit

Shank diameter: .081-.098". overall length: 2". taper: 1/4" per foot. Used for cutting, trimming and routing

This arbor is used for mounting the AES Smart Eraser Wheel (p/n AES51823) so that it can be used in a drill. Requires a drill with a 1/4" or higher chuck, and capable of speeds between 2000 and 4000 rpm.