The Doiron Type 4 is our most common cutter for deepening the diamonds and bringing them to point. Its 3/8th inch length is the optimal size for keeping straight lines and creating crisp diamonds over a majority of the pattern. It has a 20 degree angle ground on the front and rear of the cutter giving you a clear view, helping eliminate overruns. One push and one pull makes any checkering kit complete.
3/8 Single Line Carbide Cutter