A chatter free HSS countersink with a 1/4" hex shank for fast tool changes in quick change chucks. The design leaves a very clean finish in any material and is particularly useful when countersinking in hard or softwood. These FISCH chatter and burr free 90° countersinks can be used on a wide range of materials including high grade steel, synthetics, wood and both alloyed and non-alloyed steels. Also suitable for use in a drill press. The hardened shank conforms to DIN3126.E6.3. Size 5-13 mm, made in Austria.-bg