1/8" Carbide CNC 4 Flute Spiral Bit End Mill Cutter CEL 17mm Pack of 5 Go to amazon.com Related posts Which is the best milling bits? FeatureShank diameter: 3.175 mm/0.125"Suitable for Acrylic, PVC and hard woodMaterial: AlloyCutting Edge Length: approx.17 mm/0.67"Cutting Edge Diameter: approx.3.175 mm/0.125" DescriptionShank diameter: 3.175 mm/0.125;Suitable for Acrylic, PVC and hard wood;Material: Alloy;Cutting Edge Length: approx.17 mm/0.67;Cutting Edge Diameter: approx.3.175 mm/0.125