Size details of the cnc 1/4 upcut bit spiral router bits: 1/4 inch (6.35mm) shank, 1/4 inch (6.35mm) cutting diameter, 1 inch cutting length, 2-1/2 inch total length The spiral 1/4 upcut CNC router bit Made of solid carbide (Tungsten steel), it is high-wearable and has a long life. You can decrease the times of changing cutters, save production time. The CNC End Mill upcut Router Bits apply to various wood: such as Plywood, OAK, MDF, and any hardwood working and Long service life for sharp. And also for carbon steel, soft alloy steel, tool steel, cast iron, aluminum alloy. Spiral upcut bits used for side milling, end milling, finish machining, etc. End Mill Bits can smoothly upcut groove and slots, Mortises, Cycles and dados with clean edge and bottom, better than straight bits. The cnc 1/4 upcut router bit suit for CNC router and any plunge routers with 1/4" collet. Color:Silver Size:As shown Package include:1*Spiral CNC Router Bits UpCut