3/8"TwoFluteMortise CompressionBit Mortise Compression Spiral Bits feature a shorter up shear length than other compression spiral bits, making them ideal for grooves and mortises, or for through-cuts in thin double sided material (5/8" thick or less). Rout plywood, melamine and other double-sided materials, as well as hardwood and softwood. For use in CNC, hand-held or table-mounted routers. Perfect grooves and mortises in delicate materials Routs melamine, veneer plywood, hardwood and softwood Use in CNC, hand-held and table-mounted routers Black I.C.E. coating for cool cutting edge and superior chip evacuation Freud Premier Solid Carbide Black I.C.E. + Freud TiCo Hi-Density Carbide = 2X increased life and performance vs. standard uncoated bits Ideal For: through cuts in thin double-sided materials (77-403, 3/8" Shank, 3/8" Cut Dia, 7/8" Cut Length, 3" OAL DF Compression Spiral Bit)