... 6mm, lenghth is 40mm, with slot5.It's end mill with slot, for key cutting machine, be used in making car keys.6 ... saw blade, V-cutter for PCB,round kinfe,angle milling cutter, side milling cutter. Also,inclued key cutter, end mill,single angle milling ... cutter,side milling cutter,flat slotter,bitting cutter,milling cutter for cnc key cutting machine etc ...