These Deli Tools 100mm screwdriver bits are engineered for professional precision and heavy-duty performance. Crafted from high-quality S2 steel, they offer exceptional durability, high torque capacity, and superior impact resistance. Each bit features a strong magnetic tip to ensure secure and efficient screw handling, significantly improving work efficiency. The specialized blackening treatment provides effective protection against rust and corrosion, ensuring long-lasting performance even in demanding environments. This set comes in a durable plastic storage box for easy organization.