Amana - A51421 1/4" Cut Diameter Upcut Router BitThese Amana bits will produce clean, smooth cut edges in acrylic and other plastic materials. Cut Diameter: 1 4" Shank: 1 4" Cut Length: 3 4" Overall Length: 2 1 2" Flute Type: Upcut No. of Flutes: 1 The bits are made according to strict tolerances from an exclusive high quality carbide grade and polished to a mirror finish using Amana's unique process. The upward spiral geometry will eject chips up out of the cut where they can be collected by a