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. Meet Various Needs - Different size screw extractors to meet your different needs. Durable product - For removing all kinds of screws, nails and cap screws rounded broken or damaged. Practical, efficient and durable kit. Ideal gift - With a plastic case to carry the screw extractors. Straight round shank. Product Description 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 truss screws. Practical, efficient and durable kit. Black oxide finish for added durability. No.1: 3mm - 6mm. No.2: 6mm - 8mm. No.3: 8 mm - 11 mm. No.4: 11 mm - 14 mm. No.5: 14 mm - 19 mm. Match size/ thread: 3 mm - 6 mm: for M3 - M6. 6 mm - 8 mm: for M6 - M8. 8 mm - 11 mm : for M8 - M11. 11 mm - 14 mm: for M11 - M14. 14 mm - 19 mm: for M14 - M18. Material : steel. Contents: 5 screw extractors. 1 box.