Solid Carbide Ball Nose Router Bit with 1/4inch Shank and 1/4inch Cutting Diameter, 1-1/8 inch Cutting Length, 3 inch for Total Length Round Top with 2-Flute, Material: HRC55 Carbide with TiAlN Coated For CNC,Engraving Machine.Carbon Steel, Mould Steel, Inconel, Stainless Steel, Titanium Alloy etc The Route Bit Suit for CNC Router and Makita, Bosch, and Any Brand Plunge Router with 1/4" Collet End Mill Bits are Suitable for Side Milling, End Milling, Finish Machining, etc.