LMT Onsrud - 37-05 0.020" Tip Solid Carbide Single Flute Engraving Router BitLMT Onsrud 37 05 0. 020" Tip Solid Carbide Single Flute Engraving Router Bit These are single flute engraving tools designed for V grooving or bevelling operations. They can be used for both soft and hard woods, soft and hard plastics, aluminum and solid surface panels. Perfect for intricate and precise cutting, these single flute engraving tools are designed to quickly and efficiently handle V grooving and bevelling operations on a variety of