Industrial Quality Signmaking, Lettering, V Groove Miter Fold are made by Amana Tool, the leading manufacturers of high-quality wood-cutting tools. Use Amana Tool 45771 Solid Carbide 30 Degree Engraving 0.005 Tip Width x 1/4 SHK x 2-1/4 Inch Long Signmaking Router Bit for extra-fine carving and lettering details for signmaking. Used for wood, plastic, aluminum and solid surface materials. Excellent for: Aluminum, Plastic, Solid Surface, Wood. SPECIFICATIONS: Angle (a): 30; Cutting Height (B): 0.440"; Shank (d): 1/4; Overall Length (L): 2-1/4; Tip Width (t): 0.005".