This end mill has a 2 straight flutes. It works well for materials where the lifting affect of a spiral flute might cause unwanted results, like wood or things with thin laminates or veneers. Best for Cutting Corian, plastic, linoleum, wood, plywood, MDF
Inventables Solid Carbide Single Flute Upcut End Mill 1/8. The spiral upcut bits pull chips from the cutting surface upwards, leaving a flat bottomed pocket. This provides accurate cuts without chatter in the plastic because the chips are being evacuated away from the cutting edges. This bit is not recommended for wood because it pulls the wood fibers causing tear out.