Features: Magnetic Hex Head Screwdriver Bit Set from hardened steel for efficient screwdriving. Suitable for various screw and nut applications, providing convenience and efficiency. Highly quality hex head screwdriver bits with a sandblasted surfaces for durability. The black phosphate treatments prevents rust and corrosion, ensuring longlasting performances. Perfect for repair workers, electronics technicians, and enthusiasts in need of screwdriving tools. Specifications: Component：Steel Size:about 8.5x5cm/3.35x1.97in Type:60mm Hexagonal Bit Extension Conversion Head Phosphorized Black/ 20PCS set Package Includes: 1Set Hex Head Screwdriver Bit Set note: Due to problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement.