Set for unscrewing a broken bolt. Special auxiliary guide sleeves to assist pre-drilling in three cases: if the bolt has broken slightly above the surface (so-called stump). if the bolt has broken exactly at the same level as the surface. or if the bolt has broken deeper. A special hard alloy pin with a star profile is driven into the drilled hole. The pin is not conical. therefore, it does not expand the broken bolt and does not increase the already stuck seat! A special adapter is attached to the star profile. which externally has a hexagon of the appropriate size and allows you to continue unscrewing with a chuck. key. wrench or other tool suitable for the specific case.

The set includes:

• Driver sleeves Ø 4.0-4.8-4.8-4.8-6.0-7.1-7.1-7.1- 9.2-9.5 mm
  
• Drill bits Ø 3.2-4.8-6.5-8.0-8.5 mm
  
• Carbide-tipped rods Ø 3.2-4.8-6.4-8.0-8.7 mm
  
• Adapters 10-11-13-14-17 mm