BiTorsion screwdriver bit works to absorb damaging peak loads and provides a considerable increase in tool life. This premium quality bit is designed for multi-purpose use and prevents cam out. It is made using thousands of tiny diamond particles which bite tightly to the screw head, offering a secure screw fit and long service life. The bit features a 1/4in Hexagon drive and is a Phillips 2 point type, measuring 25mm in length.