4Pcs/Lot,Micro Flat Square End Mill;UnCoated;Three Flute;Solid Tungsten Carbide CNC Router Bit for Aluminum Brass Bronze(4mm Mill Dia+20mm Cut Lg+4mm SHK+100mmOAL)

1.longest life and best finish on hard material.Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. They have a square end for milling square slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface. 2.End mills with two-Three flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts. End mills with four flutes provide a finer finish and operate with less vibration when run at high speeds.

• 4mm Mill Dia.+20mm Lg.of Cut+4mm Shank Dia.+100mm Overall Lg.,HRC58,Three Flute,uncoated end mills for general purpose milling and short production runs
• High quality material of tungsten steel,Wear-resisting and Not easy to stick milling cutter,Tolerance:0.001mm
• Three Flutes dissipate heat better than other end mills, especially at high speeds. At high temperatures
• Speed machining and High degree of smoothness,Applicable to the hardness below HRC58 for Aluminum, Brass, Bronze,Iron,Nickel,Plastic
• Package:4pcs endmills