Premium Material: High strength chrome vanadium steel bits withstand more torque and reduce wear-outs to ensure durability and longevity. Interchangeable shaft for quick and easy switch out. High hardness S2 bit made of alloy steel: screwdriver bit is made of high-quality S2 alloy steel, it is chrome plating treated for corrosion and beautiful appearance. The blade is made of chrome vanadium steel, which has good wear resistance. The handle of the screwdriver is made of ABS plastic and has an ergonomic handle that is comfortable to hold, reducing manual work during use. Widely used repair tools: perfect repair tools compatible with refrigerator, air conditioning and other electronic devices, as well as household appliances and car repairs, circuit repair, bicycle repair, electrical maintenance, switch installation, etc.