These three wing carbide tipped slot cutters feature anti-kickback three wing blade design and CMTs trademark orange PTFE Industrial Coating. All cutters feature an 8mm bore that fits CMTs arbors (items 7/8/924).The shank available for the North American Market is 1/2".These three wing carbide tipped Slot Cutters feature anti-kickback three wing blade design and CMTs trademark orange P.T.F.E. Industrial Coating. All cutters feature an 8mm bore that fits CMTs arbors (items 7/8/924).