Specification Brand : Teenment BulletPoint1 : 4.1mm Mill Dia.+12.3mm Lg.of Cut+6mm Shank Dia.+50mm Overall Lg.,HRC58,Three Flute,uncoated end mills for general purpose milling and short production runs BulletPoint2 : High quality material of tungsten steel,Wear-resisting and Not easy to stick milling cutter,Tolerance:0.001mm BulletPoint3 : Three Flutes dissipate heat better than other end mills, especially at high speeds. At high temperatures BulletPoint4 : Speed machining and High degree of smoothness,Applicable to the hardness below HRC58 for Aluminum, Brass, Bronze,Iron,Nickel,Plastic BulletPoint5 : Package:4pcs endmills BulletPoint6 : Only compatible with ZCC USA inserts CutType : Center Cutting EndCutType : Square End ExternallyAssignedProductIdentifier1 : 0746555752819 ExternallyAssignedProductIdentifier2 : 746555752819 FinishType : Unfinished IncludedComponents : NO ItemName : 4Pcs/Lot,Micro Flat Square End Mill;UnCoated;Three Flute;Solid Tungsten Carbide CNC Router Bit for Aluminum Brass Bronze(4.1mm Mill Dia+12.3mm Cut Lg+6mm SHK+50mmOAL) ItemShape : Square ItemTypeKeyword : square-nose-end-mills Manufacturer : suolai Material : Carbide NumberOfCuttingEdges : 3 NumberOfFlutes : 3 NumberOfItems : 4 PartNumber : SSSED ProductDescription : 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.