These steel spacing tools are meticulously made, heat treated, and tempered, providing you with the exacting tolerances you demand. The precision and care that goes into each tool gives you all the accuracy needed for laying out stunning checkering patterns by hand. Every 60-degree V groove cutter has teeth cut into it, allowing the cutter to follow the already established lines. They grab and track like an all-wheel drive vehicle, providing smooth cuts and straight lines during layout. Currently available in 2 and 3 line at 16, 18, 20, 22, 24, 26. 28, and 32 LPI.