Are you looking for a professional, yet affordable screwdriver bit? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further Our professional screwdriver bit must meet you needs. It is one of the best choices for you. Features - Color: Silver. - Material: Alloy steel. - Size: 13.2 x 7 x 3 cm. - They will fit a 1/4 inch chuck. - Suitable for ratchet wrenches, all drills, electric screwdrivers and other power tools. - The magnet in the bit holder,enough to allow the bits to magnetically hold screws in place. - 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. - S2 Material: anti-rust and anti-corrosion, calibration heat treatment process, durability and reliability of 62HRC.