ITEM NAME:29 Piece Screwdriver Bit Set 1/4 Inch (6.35Mm) With Magnetic S2 Steel Preci I3I5 29 Piece Screwdriver Bit Set 1/4 Inch (6.35Mm) With Magnetic S2 Steel Preci I3I5 Screw Head Type:Phillips,Pozidriv,Torx,Y-Type,Square Socket,Slotted,Hex Magnetic:Yes Type:Mini Screwdriver Features:Multifunctional Screw Head Type:U-type Weight:190g Size:1/4 inch(6.35mm) These are a standard bit. They will fit a 1/4 in chuck. The magnet in the bit holder,enough to allow the bits to magnetically hold screws in place. surface phosphating rust,portable packaging Application: Suitable for ratchet wrenches, all brand drills, electric screwdrivers and other power tools. Multi-magnetic drives can easily fix the drill bit and pull out the screws. Strong magnetic: drill holder with strong magnetic force. S2 material: anti-rust and anti-corrosion, calibration heat treatment process, durability and reliability of 62HRC. Plastic box packaging: box size: 132 * 70 * 30mm. A variety of batch head shapes, to meet various needs, flexible application, so that the work is more time-saving, labor-saving, faster and more efficient. colour:black Material:steel Package Contents: 28 * Screw batch head 1 * magnetic bit holder