The screwdriver bits are made of high quality S2 steel, high hardness, wear resistance and impact resistance, the surface adopts sandblasting process, durable for long time service. Easy to hold the screws, convenient to use in multiple work scenarios, especially in tight space. The non slip tip will secure the screws more tightly to prevent slip. The precision is strictly controlled in production process, perfectly fits the screws, not easy to slip and collapse, the bits are straight and concentric, effectively reducing the bit swinging.