The material is made of high-grade S2 alloy steel. The manufacturing process is CNC precision manufacturing and undergoes vacuum secondary tempering and heat treatment to ensure that the drill bit is strong and durable. This also makes it durable, making it a reliable choice for DIY projects or professional work. Made from high-quality chromium vanadium steel, this screwdriver head offers high hardness, wear resistance and rust resistance, making it an excellent choice for mechanical applications. In addition to the classic HSS construction, the screwdriver bits are electroplated to ensure maximum functionality and durability. It's treated with black phosphate to resist corrosion, making it a durable option that can withstand the elements and environments.Due to their strong magnetism, our magnetic crossheads easily attract and secure screws for convenient and efficient use. The expanded twisting area helps absorb the high torque of the new impact driver, making the bit more efficient when driven on an impact drill. The precision-engineered tip allows for a tighter fit and less CAM stripping, which helps improve drilling accuracy and efficiency. It also comes with a convenient storage box, with each tool packed in a sturdy box to store them in a safe and secure manner. Each bit is placed exactly where it belongs and does not move during shipping. Easy-to-use storage solutions make it easier to find the right accessories, saving you time.