High quality - Our screw extractors and screw extractors are made of HSS 4341 to minimize corrosion and rust. Provides strength, flexibility and durability. The ideal screw removal tool can meet your needs for removing all types of bolts and screws. The broken bolt extractor bit kit for screw extractor is compatible with most electric drills and covers most screw sizes (3-12mm) encountered in daily use. It is suitable for hex socket bolts, wood screws, hex bolts, round bolts, etc. It can be solved even if it is rusty, broken or stuck. Wide range of uses: The screw extractor can be used in many situations: furniture installation, garden decoration, door replacement, parent-child DIY. It is a good gift for family, friends and husband. 33-piece multiple screw removal tool - 10 drill bits (Dr # 1-Dr # 10) + 10 extractors (Ex # 1-Ex # 10) + 10 screwdriver bits (VH2, VH3, VH4, PH1, PH2, PH3, 5mm, 6mm, T15, T20, T25) + 1 quick release extension bit holder + 1 extension bit holder + 1 socket adapter. Precautions-When choosing a drill bit, you should choose a drill bit smaller than the damaged screw, and the speed of the electric wrench should be less than 200PRM, to avoid hurting yourself and damaging the items.