Amazon.com: SpeTool Single Flute (O Flute) Spiral End Mill Aluminum Cutter Carbide Router 1 inch Cutting Length with 1/4Inch Shank for Aluminum Acrylic PVC MDF Plastic : Musical Instruments
⅛” X ¼” Up-Spiral O-flute Router Bit | Shaper Store
SpeTool 1/4 Dia O Flute Spiral CNC Upcut End Mill For Aluminum&Acrylic
57329 Metric Solid Carbide CNC Spiral 'O' Single Flute, Plastic Cutting 12mm Dia x 38mm x 12mm Shank x 76mm Long Up-Cut Router Bit
SHAPER ⅛” X ½” Up-Spiral O-flute Router Bit SE1-2500-5000C - Sulphur Grove Tool
Yonico O Flute Upcut Spiral End Mill 1/8 in. Dia 1/4 in. Shank Solid Carbide CNC Router Bit 31011-SC - The Home Depot
CNC Router Bits | Single Flute Solid Carbide Straight O RO145