This Milwaukee Tool 48-32-4184 Shockwave 2" Impact Torx T20 Power Bits is a reliable and durable fastening tool that is perfect for any DIY or professional project. It features a shank style hex, fastening tool tip size T20, and a fastening tool material S2 steel. This power bit is a single end/double end single end, with a hex shank size of 1/4 inch and an overall bit length of 2 inches.