LMT Onsrud - 37-07 0.030" Tip Solid Carbide Single Flute Engraving Router BitLMT Onsrud 37 07 0. 030" 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. With a precise, single flute design, these engraving tools offer the strength and durability for a wide range of applications, including V grooving and bevelling operations in soft and