DIN shell mill arbors,combination shell end mill arbors.DIN 69871, CNC milling machine,G6.3 8000-12000r/min.G2.5 12000-20000r/mi DIN shell mill arbors,combination shell end mill arbors. DIN 69871,DIN69872.For CNC milling machine,G6.3 8000-12000r/min.G2.5 12000-20000r/min. For clamping shell end mills DIN 841 and DIN 1880 as well as angular milling cutters DIN 842 and cutters DIN 1830.