LMT Onsrud - 63-618 3/16" Cut Diameter ACM Profiling Upcut Router BitOnsrud tools are made of solid carbide which ensures that they stay sharp much longer than high speed steel tooling. The single upcut flute will clear chips very efficiently for high feedspeeds. Cut Diameter: 3 16" Shank: 1 4" Cut Length: 5 8" Overall Length: 2" Flute Type: Upcut The tools are designed for high clearance on the backside of the flute to minimize heat buildup and therefore do not require lubrication. They are especially effecting for