This is a system approach for drilling a center hole in broken bolts or studs. It is thread specific i.e. the set contains the popular metric thread sizes- 6 x 1, 8 x 1.25, 10 x 1.5 and 12 x 1.75. The guide threads into a stud that is broken below the surface or sleeves over protruding broken bolts. This is a standard tool in machine shops and an amazing time saver for technicians who encounter broken fasteners. Original price was $129.95/set-expensive but everyone loved the tool- now at $89.95 it will pay for itself on the First application! Click on the video link for additional information.
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