A 1/4" Drive, 150mm long extension bit holder from Irwin, ideal to be used in tight, hard to access areas, a must have for any toolkit. The perfect extension for power bits, Irwin Blue Groove flat & auger bits, step drills & much more, this handy extension is hard wearing & durable & features a one handed quick release mechanism for ease of use, ergonomic jaw design & lightweight carbon steel construction.