Adopted high quality S2 steel, and heat treated, which is anti-shock and tough, highly wear-. The whole body of the screwdriver bit is magnetic, the length is 100mm, which can suck the screw, improving your work efficiency. The sizes are: Torx T8 T9 T10 T15 T20 T25 T27 T30 T40, PH1 PH2 PH2, HEX H2 H2.5 H3 H4 H5 H6, PZ2, SL5 to meet your different needs. 1/4 inch hex bits bits fit for electric screwdriver, hand screwdriver, electric drill, air drill, cordless drill, impact driver and so on. The storage box is neatly packed, each bit is marked with the size, you can use it easily Material:S2 steel colour: Silver Gray Package Contents: 18 x Torx Bits(T8 T9 T10 T15 T20 T25 T27 T30 T40) 12 x Hex Bit(H2 H2,5 H3 H4 H5 H6) 2 x PH1xΦ4mm bit 4 x PH2 bit(PH2xΦ5mm PH2xΦ6mm) 2 x PZ2xΦ6mmBit 2 x SL5 Bit Only the above package content, other products are not included. Note: Light reflection 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.