Two Flute Helical Cutters Suitable For Non-Ferous Metals With Long Shank Fine Finish & Up-Cut.Cutter Are Designed To Plunge And Machine Or Mill Lateral Slots. All Aluminium Tooling Should Be Used With A Coolant Wax Stick Or Lubricant. Material Should Be Securely Clamped.PTDTREDIRS5508X8MMSTC