Taper pin hand reamer Design: HSS, DIN 9-B with left spiral approx. 7°. The uneven tooth pitch ensure chatter-free and accurate drilling. With cylinder shank with square drive. Bright surface Application: For reaming conical holes for taper pins according to DIN 1, DIN 258, DIN 1447, DIN 7977 and DIN 7978. Perfectly suited for single production or repair work. Also suitable for holes with interrupted cut. Pre-drill with a cylindrical jobber drill or pin drill. Particularly suitable for steels up to 500 N/mm² in strength such as non-ferrous metals, plastics, steels up to 1000 N/mm² and casting materials.