General description This Left Hand Screw Extractor and Drill Bit Set includes 11 pieces designed to effectively remove damaged, rusted, or stripped screws, bolts, and fasteners. The high-speed steel drill bits provide exceptional hardness, allowing them to drill through most screws with ease. Technical specifications Material: High-speed steel Drill Bit Diameters: 2.0mm, 3.0mm, 4.0mm, 6.5mm, 7.5mm Suitable Screws: #1 for M3~M3.5; #2 for M4~M4.5; #3 for M5~M7; #4 for M8~M9; #5 for M10~M12 Usage To use the extractor set, first drill a hole in the center of the broken screw with the appropriate drill bit. Then, utilize the corresponding extractor to remove the screw. The tool steel extractors feature a left-hand spiral groove for enhanced gripping power. Other information The set includes a tapping handle that securely holds the extractor, and for larger extractors, an adjustable wrench can be used.