Rennsteig stud extractor sets of 5 to 8 pieces

A stud extractor removes a broken tap, bolt or screw from a threaded hole without ruining the thread in the workpiece. These Rennsteig sets hold extractors in rising sizes, so that during maintenance, repair and machine building you have the right size to hand for every broken piece. They belong to the Rennsteig sets and kits for machining work.

The left-hand sets carry the designation MT 1-5, MT 1-6 or MT 1-8 and contain 5, 6 or 8 extractors. A left-hand extractor bites into the broken part as you turn it anticlockwise, and so turns that part out of the hole. Alongside these there are two 5-piece sets without that designation.

Choose the set by the range of thread sizes you work with. The 5-piece set covers the smaller sizes, while the 6 and 8-piece sets go further up and are useful when the workshop sees a wide mix of bolts. Before you start, drill a hole in the broken part that matches the size of the extractor.