Features: Brand new and high quality Made with alloy steel, the hardness reaches the stable standard HRC60+. Slim but highly durable, 3 times the torque of ordinary bit The manufacturing and the screw bites more precisely to prevent slippage and breakage. The whole bit is magnetic and has a tight bites, which is convenient for sucking screws during operation and improves efficiency. Suitable for a variety of tools such as wind screwdrivers, electric screwdrivers, and rechargeable screwdrivers. Strong torque effect, effectively prevent the cutter head from twisting and breaking. Specifications: Material:Steel Type:75mm/100mm 75mm:Approx.7.5cm/2.95inches 100mm:Approx.10cm/3.93inches Package Includes: 8Pcs Screwdriver Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.