Trend Professional Window Industry Cutters 55/1X1/4HSS - Straight Two Flute for Aluminium & Plastic 6.3mm Diameter x 12.7mm Cut Key Features: Straight two flute for drilling and slotting, cutting aluminium anodised duralium and uPVC plastic Cutters are designed to plunge and machine or mill lateral slots All aluminium tooling should be used with a coolant, wax stick or lubricant Ideal for recessing and slotting extrusions HSSE is a special grade for machining the most abrasive anodised finishes For grooving and profiling of aluminium and plastics Specification: D: 1/4 inch (imperial diameter) D: 6.3 mm (metric diameter) C: 1/2 inch (imperial cut length) C: 12.7 mm (metric cut length) OL: 65 mm (overall length) Shank Diameter: 1/4 inch Recommended speed: 1000-10000 rpm