Features EXCELLENT PERFORMANCE: Drill bits are made of high-speed steel for high hardness that can drill on most screws. Tool steel extractors have a left-hand spiral groove designed for additional gripping power. STRONG PRACTICALITY This kit is designed to remove damaged, rusted or stripped screws, bolts and fasteners. Make your life easier: our product comes with a tap handle, which can hold the extractor tightly; for the large puller, you can use an adjustable wrench. Easy to use: first drill a hole in the middle of the broken screw with a suitable drill and then use a suitable extractor to remove the screw. EXCELLENT CUSTOMER SERVICE We care about the feelings of every customer. If this product does not meet your expectations, please do not hesitate to contact us. We will do our best to serve you. Specifications: Material: HHS (drill), tool steel (extractor). 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 diameter: 2.0 mm, 3.0 mm, 4.0 mm, 6.5 mm, 7.5 mm Package includes: 1 x Broken Screw Extractor Set Package List