Adjustable Interface: The adjustable interface allows you to press down to adjust bit length and change bits. Strong Magnetics Process Bits: The strong magnetics design on the heads of bits to and firmly the screws and your working efficiency. Various Types of Bits: Comes with various types of bits such as slotting shape bits, the crossing bits and other types bits to meet your different needs. Portable Size: The small size of this tool is convenient for everyday use. Preferred : This bits are made of chrome-vanadium steel , superior wear and corrosion resistant, not easy to rust and can a long service time. 17pcs bits size: U2.3, U2.6, T10, T15, Y0, Y1, 4.0, 5.0, T20, T25, 4.0(crossing), 5.0(crossing), 2.3(triangles), 2.6(triangles), inner crossing bit, new three points bit Colour:grey :Chrome vanadium steel Package Contents: 1 x Screwdriver 16 x Bits 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.