High quality and durable product - Made of high quality alloy steel. Easy and quick to use - Set of screw extractors for easy and quick removal of broken screws, bolts and studs. To Meet Various Needs - Different size screw extractors to meet your different needs. Durable product - For removing all kinds of broken or damaged screws, nails and truss screws. Practical, efficient and durable kit. Ideal Gift - With a plastic case to carry the screw extractors. Straight round tail. Key features: This kit removes damaged screws that cannot be removed with a standard screwdriver. Remove all kinds of broken or damaged screws, nails, and buttonhead screws. Practical, effective and durable kit. Black oxide finish for added durability. No.1: 3mm - 6mm. No.2: 6mm - 8mm. No.3: 8mm - 11mm. No.4: 11mm - 14mm. No.5: 14mm - 19mm. Size/thread correspondence: 3mm - 6mm: for M3 - M6. 6mm - 8mm: for M6 - M8. 8mm - 11mm: for M8 - M11. 11mm - 14mm: for M11 - M14. 14mm - 19mm: for M14 - M18. Material: steel. Content: 5 screw extractors. 1 box.