Dormer Bolt Removal Kits for the easy removal of broken bolts. Each set contains: 1 x Bolt Milling Burr (P100)1 x Bolt Centring Burr (P101)1 x Stub Drill HSS-Co (A117)1 x Screw Extractor (X106X) HOW TO USE Use a right-handed straight grinder or drill. Ensure that the bolt face mill is perpendicular to the broken bolt Step 1: Cut the broken bolt flat with P100 Step 2: Cut a centre in the rough surface to ensure the hole is drilled centrally in the bolt using P101 Step 3: Drill a hole in the bolt for the screw extractor using A117 Step 4: Remove the bolt with the screw extractor X106X