This Wera Impaktor SB Bit is ideal for heavy-duty use and can be used with high-voltage impact drivers. The rough diamond coating reduces the danger of slipping out, providing maximum grip and preventing cam-out. It features a black oxide finish with a diamond-coated tip and a 1/4" bit holder. The bit type is Torx, with a hex bit size of T25 and a length of 50mm. Impaktor technology ensures an above-average product life, even in extreme conditions.