Provides smooth finish in acrylic materials, and both soft and hard plastics, #46391, direction Up-cut, diameter (D) 1/2, cutting height (B) 1-1/4, Shank (D) 1/2, overall length (L) 3, flutes 2, 46391 Solid Carbide slow spiral o flute acrylic cutting 1/2 dia x 1-1/4 inch x 1/2 shank Up-cut router bit