This is a 5 degrees per side tapered ball solid carbide end mill. This carbide end mill has a .020 (0.50mm) ball nose cutting tip to give the detail you need. Specially designed for Carving and Milling Wax, Plastic, Wood, Aluminum, Bronze, and many other materials. This Tapered Ball End Mill Features Cutting Tip – .020 inches (0.50mm) ball Length of Cut – .350 inches (9.0mm) Included angle – 10 degrees (5 degrees per side) Solid Carbide – Shank Diameter: 1/8  (3.175mm) – Tool Length: 1-1/2 inches (38mm) Excellent for Cutting: 2D and 3D contouring, profiling, modeling and pattern making for cabinetry, sign making, furniture making and jewelry mold making. Dimensional signage Great for deep profiling Miniature mold making What is a Tapered Ball Nose bit? Tapered ball nose end mills are the most commonly used tools for CNC carving in wax, wood, plastic, and metals. Their tapered profiles make them much stronger than equivalent straight-wall tools while providing more flute volume for efficient swarf removal in deep, single-pass machining operations.