Diameter: 14 mm Overall Length: 152 mm Faithfull Impact Rated Flat Bits are designed to perform fast, clean cuts, will bore all types of timber and are equally efficient when drilling with or against the grain. All bits have a precision ground point and cutting surfaces with extended spurs for faster cutting. All sizes except the 6mm, have a non-slip hexagonal shank with a locking mechanism compatible with adaptors or chucks with a built-in quick-release feature. A 300mm extension shank is available for use with flat bits of 16mm and above, for deep drill applications. Ideal for use with both mains or cordless drills. Made to DIN 3126 quality with 1/4in hexagonal non-slip shaft.