Highly Robust - The Impact Control Screwdriver Bit is highly robust and even withstands the high power of impact drivers. Its extended torsion zone makes the bit extremely sturdy for long-lasting work, while S2 Modified Steel and an optimised heat treatment process provide extra-tough endurance for high performance. This product is perfect for heavy-duty applications such as plant installations or heavy industry work. It has a 1/4-inch external hex shank for use with drill drivers, screwdrivers and especially with impact drivers. Features and Benefits • Highly Robust • Impact Control Screwdriver Bit is highly robust and can even be used with impact drivers • Extended torsion zone for extreme sturdiness in long-lasting work Specifications Dimensions: T40 Length: 25mm