The ultimate set for signmakers. Designed for creating signs and other CNC projects in a variety of materials. For the most demanding signmaking lettering and engraving tasks. Each router bit is manufactured from amanas exclusive grade carbide according to stringent quality standards, #AMS-132, (D) shank: 1/4, AMS-132 18-Pc sign making advanced CNC router bit Collection, 1/4 inch shank