JINYI 1. High-quality steel alloy material is made of high-quality alloy metal material, which is impact resistant, good toughness, very wear-resistant and not easy to rust, and can be used for a long time. The smooth surface will not damage the screwdriver or the head of the screwdriver and can be used for high-precision repair work. 2. Drill a hexagonal screwdriver, each tip has a correspondingly sized hole to hold the screw and nut. Clear specification text for each surface allows you to select the drill you need and saves time. 3. The inner kit includes a 1/4 black Allen key "with screwdriver bits on both ends, which can be used as a practical screwdriver. Non-slip surface, easy to use. He has two heads, one is straight and the other is right-angle, Comfortable to meet your needs.Multifunctional screwdriver bit kit for quick removal of hexagon heads, suitable for electric screwdrivers, screwdrivers, drills, pneumatic drills, etc. in the field of technical, mechanical, appliance repair and other production lines. Ideal for vehicle furniture, bicycles and bicycles. Features: 10 kinds of drill bits. A set of 10 screwdrivers The set contains a set of drill bits T6, T7, T8, T10, T15, T20, T25, T27, T30, T40 with a length of 100mm, which can meet your different needs. Size: diameter 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 8.0mm