Description Strong Magnetic: Magnetizable bit screwdriver bits can be easily keep screws stuck to them,can improve your work efficiency. High Precision Performance: All the bits are made by S2 steel and a bit holder is made by chrome vanadium steel. The long lasting bits were deeply milled tempered and coated for strong shock resistance. no damage to the screw and the screwdriver . Exquisite Packaging: The case comes with is very zips shut all the way around to hold everything plus has individual bit holders in it to keep everything organized. Easily carried or conveniently stored in a larger tool box. Usage Versatility: fit for electric screwdriver, hand screwdriver, electric drills air drills. Perfect for working on vehicles, bicycles furniture. Assembling/repairing your furniture in an . Multi Bit Set - 30 pcs screwdriver bits set: slotted++square +torx bit set in a variety of sizes. colour: as shown Material: S2 Size: about 100mm long Package Contents: 30 x screwdriver bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.