4 PCS /Set Speed Out Screw Extractor Drill Bits Tool Broken Damaged Bolt Remover. Made from Alloy steel (S2) . steel use ,more better than Chrome-Vanadium Steel. Two-step drill bit and extractor in one tool. Multiple tools not required.. Very easy to use, first drill the screw head. Then pick a appropriate size remover bit. Put drill in reverse and use some effort, the screw will come. Can be used in quick change chucks. Easy to use..
