Onsrud 54-240 Solid Carbide router 4FL 1/2 x 1-1/8 x 3-1/2 OAL For Composite, Fiberglass, 1/2 Shank, Fet2 Coated

Three and four flute tools for machining glass-reinforced plastic. Geometry has been optimized to shear the glass fibers while creating a chip which removes heat from the cut to avoid melting of the material.