A very useful set of flat spade drills with a hex shank. Suitable for soft and hard woods. Includes common and useful sizes; 6mm. 10mm. 13mm. 16mm. 19mm. 22mm. 25mm. 32mm. 300mm Extension bar Allen Key Inc. Total length 6". Extension Bar 300mm Sizes are stamped on each drill for easy identification. Standard 1/4" hex shank fits cordless screwdrivers but can also be clamped in a standard drill chuck and helps prevent slipping. Hardened steel construction is perfect for wood work. Hard enough to be sharp and cut easily but not to brittle.