30Pcs Set 100/150mm S2 Steel Magnetic Screwdriver Bits 1/4 Inch Hex Shank Power Tools Slotted Cross Square Torx

[Feature]: 1. Those Screwdriver Bits are made of S2 alloy steel which is anti-impact and tough, great wear resistant. 2. Strong magnetic, good workmanship, high precision. each edge can be accurately locked screws, no damage to the screw and the screwdriver head. 3. Accessible: Case container bit retention system keeps bits secure, labeled bit slots help keep your tools organized. [Specification]: Material:S2,More Durable Treatment: Heat treatment nickel plating, prevent rust. Shank: 1/4 inch hex shank 6.35mm.(Can use it manually or use it for cordless screwdrivers) Length: 100mm OR 150mm. Use: You can use it for home, auto repair, electrical repair, electronic product repair, machine repair, etc.