Professional Autoloader- 6-in-1 Multi-bit Ratcheting Screwdriver Sl3- Sl4 Sl6 Features: Bit size: SL3- SL4 SL6 PH1 PH2 PH3-. Perfect for the professional or do-it-yourselfer. Bit Viewer lets you select the right bit instantly from the Quick-Change Barrel. You do not need to find a complete set of screwdriver tools, which will meet your needs of multi-purpose. Our screwdriver bits are made of for CR-V steel, which builds up extraordinary hardness and superior toughness to stand greater torque and reduces wear for maximum rust and corrosion for protection. Specifications: Material: for Cr-v Bit size: SL3- SL4 SL6 PH1 PH2 PH3- Note: Please allow 1-3cm 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. Package includes: 1X Ratcheting Screwdriver