PROFESSIONAL TOOL - The threaded structure screw extractor designed at the tail can quickly connect and tighten the screws, helping you easily complete the disassembly work, it is a small professional tool and a good gift for menBEARING STEEL MATERIAL - Professional screw extractor set made of hard bearing steel with a hardness range (HRC: 60 ~ 65), it has high performance in contact fatigue, high wear resistance and toughness, can be used in high-speed and high-load environmentsSCOPE OF APPLICATION - Broken screw extractor kit, can be used with drill bits, wrenches and tap wrenches, suitable for thread sizes M3-M25, can help you remove damaged screws with a diameter of 1/8 to 1 inchCONVENIENT STORAGE - Bolt extractor comes with a plastic storage box with different compartments inside depending on the model, so you can quickly organize the storage after use MULTIPURPOSE - Broken screw extractor can be used to remove broken screws, rusty screws, water pipes, worn and slippery screws,