Material: carbon steel Color: Silvery 1. upgraded non-slip design - The set comes with a unique design to improve grip and control while working, easier to use. 2. PH2 Ruggedization - These screwdriver bits are made of PH2 standard with excellent ruggedness and durability, which can easily withstand high-pressure impacts. 3. MAGNETIC ADHESION - The magnetic adsorption function can better hold the screws and nuts, avoiding them from loosening and getting lost during disassembly and assembly. 4. Efficient work - The whole set is designed to improve work efficiency, which can accomplish tasks quickly and precisely, thus saving time and energy. 5. Multiple Sizes - The set includes various sizes of screwdriver bits, which can meet different work requirements, freeing your hands and bringing you a more enjoyable using experience. Package includes:1set*Upgraded Non-slip PH2 Impact Driver Bit