Equipped with a handle---Our product set is equipped with a faucet handle which can fix the extractor; for large extractors, you can use an adjustable wrench. High hardness--- The drill bit is made of high hardness and high steel, which can drill holes on most screws. Better grip--- The tool steel extractor of this product has a left-hand spiral groove, designed to provide better grip. How to use--- First use a suitable drill bit to drill a hole in the center of the damaged screw, and then use a suitable extractor to remove the screw. Applicable occasions--- This kit is designed to remove damaged, rusted or peeling screws, bolts and fasteners. Number of parts delivered: 1 set Features: Material: HSS (drill bits), tool steel (extractors). Suitable screws (for reference only) : #1 for M3~M3.5. #2 for M4~M4.5. #3 for M5~M7. #4 for M8~M9. #5 for M10~M12. Drill bits diameter: 2.0mm, 3.0mm, 4.0mm, 6.5mm, 7.5mm. luckymeet