Features: _x000D_This set is designed to remove damaged, rusted or stripped screws, bolts, fasteners. _x000D_Drill bits are made of high speed steel for high hardness that could drill on most screws. _x000D_Tool steel extractors have left handed spiral flute designed for extra gripping power. _x000D_Easy to use, drill a hole in the center of broken screw first with proper drill bit, then use a proper extractor to take screw out. _x000D_Come with an tap handle that can hold extractor firmly; for the large extractor, you may use an adjustable wrench. _x000D__x000D__x000D_Specifications: _x000D_Material: HHS(drill bits), tool steel(extractors) _x000D_Suitable Screws(for reference only):_x000D_#1 for M3~M3.5_x000D_#2 for M4~M4.5_x000D_#3 for M5~M7_x000D_#4 for M8~M9_x000D_#5 for M10~M12 _x000D_Drill Bits Diameter: 2.0mm, 3.0mm, 4.0mm, 6.5mm, 7.5mm _x000D__x000D__x000D_Package Includes: _x000D_1 x Broken Screw Extractor Set _x000D__x000D__x000D_Note:_x000D_Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1This set is designed to remove damaged, rusted or stripped screws, bolts, fasteners 2Drill bits are made of high speed steel for high hardness that could drill on most screws 3Tool steel extractors have left handed spiral flute designed for extra gripping power 4Easy to use, drill a hole in the center of broken screw first with proper drill bit, then use a proper extractor to take screw out 5Come with an tap handle that can hold extractor firmly; for the large extractor, you may use an adjustable wrench