7.5° x 1/4″ Engraving V-Groove Solid Carbide Bit. 45/64″ Cutting Length. 1/4″ Shank. Perfect for engraving and lettering applications in hard or soft wood, or composite materials. Ideal for Wood, Wood Composites, Plastics (Hard & Soft), and Aluminum for 2D and 3D Carving.