Features: Brand new and high quality Made of highstrength alloy steel, it is harder and more wear-resistant. Overall quenching heat treatments for higher hardness. The head blade is sharp and durable, with fine teeth and long threads, ensuring good bite. Using a hexagonal design in conjunction with a hand electric drill for secure clamping, the drill can be securely clamped without slipping (also for electric screwdrivers). Equipped with a storage packaging box, easy to use and take, neat and orderly, not easy to lose. Specifications: Material: Alloy Steel Double head size 0: 1-3mm screws Double head No.1: 3-5mm screw Double head No.2 4-8mm screw Double head No.3: 5-10mm screw Double head No.4: 6-16mm screw Double head No.5: 8-19mm screw Ф3-word T15meter character T30 meter character PH1Cross H4 hexagonal socket H6 hexagonal socket PH2Cross Package Includes: 13PCS x Damaged Screw Extractor note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.