This DEWALT HSS-G Jobber Drill Bit has the following specification: Diameter: 4.0mm Overall Length: 75mm Working Length: 43mm Pack Quantity: 2 The DEWALT HSS G-Jobber Drill Bit is a precision ground twist drill bit for rapid drilling, long-life and excellent concentricity. It has been manufactured from High-Speed Steel that conforms to DIN 338. The drill bit is ground from solid stock and has a right-hand cutting, type N flute with a precision ground end at 118 point angle.