Two straight main cutting edges with chip breaking flutes. With stepped cylindrical shank Ø 13 or 16 mm, Milling of slots in soft wood with a slot drilling machine. Due to the special geometry of the head piercing use is possible. Not appropriate for hard wood. Limited suitable for hard wood is our product line 1607 (curved and fully ground version). Alloyed tool steel, 2200 - 4000 rpm. e.g. Ø 16 mm 2200 rpm in soft wood. Further details in the speed-diagram