Tip size ordered with 2mm diameter or 1.0mm radius. Description: SpeTool Tungsten Carbide 1/4" Shank 3" OVL Tapered End Mill with 2.0mm Tips for CNC Wood Carving. Tips ASIN B07HNYSBGS2.0 mm = R1 or radius 1.0 mm. 4D1/4 Specifications for this itemASIN X001WKNCDPBrand Name SpeToolCut Type Tapered End MillCutting Angle 2.20 degreesCutting Length 1-1/4" Cutting Edge End Mill Material Carbide Measuring System English/Standard Model Number R1.0-D1/4