ITEM NAME:5 Pcs Extra Long 6mm 2 Flute Steel HSS & Extended End Mill Cutter CNC B ESY.Color: Lengthened 6 6 24 68. 5 Pcs Extra Long 6mm 2 Flute HSS & Extended End Mill Cutter CNC Bit Set Steel. Milling Cutter 5. We'd like to settle any problem in a friendly manner. Material: High Speed Steel.