Ko-ken RS3129/6-L32 3/8 Sq. Dr. Bolt Twister Set, 2mm-10mm. This 6-piece set is an essential tool for removing broken bolts with missing or damaged heads. Designed for recovery work, the set includes sizes 2mm, 3mm, 4mm, 6mm, 8mm, and 10mm. To use, drill a hole in the center of the broken bolt, insert the bolt twister, and turn left until it grips the bolt, allowing for easy removal. The sockets, each with a 32mm length, are mounted on a 150mm rail for convenient storage and accessibility. With a 3/8" drive, this set provides a reliable solution for extracting troublesome fasteners.