ITEM NAME:5*6*13*57mm 3 Flute HSS CNC End Mill Cutter Straight Shank Bit Extended JR Features: High-density polished, lengthened, super hard, wear-resistant, high temperature. Mainly used in cutting and hook slots. Application materials: mold steel, cast iron, carbon steel, alloy steel, tool steel. Specification: 100% brand new Material: HSS Size:5*6*13*57mm.High-density polished, lengthened, super hard, wear-resistant, high temperature. Size:5 6 13 57mm. Material: HSS. Mainly used in cutting and hook slots.