Tools Extra Long Carbide Ball Nose End Mill for Cutting Alloy Steels, with HRC62 Tungsten Carbide+AlTiN Coating,4" Overall Length CNC Router Bits,3/8 Shank End Mill Bits (3/8-4" 1PCS)

Coating :All end mill set with AlTiN Coating,it is excellent resistance to high temperature and thermal impact. | Material:HRC62 ultrafine grain tungsten carbide, toughness and hardness and wear resistance. Manufacturing:Five-axis high precision grinding machine, keep the carbide router bits Stable and controllable. | Quality Control:Each milling bit will be tested on the detecting instrument and laser a code. | Design: Double cutting edge make the milling bits sharper and efficiency, high feed rating and greatly surface finishing. Application:Finsh Machining and Rough Machining. | Inch Size and Diameter Tolerance:Diameter 3/8- Cutting Edge Length 2" - Overall Length 4.0" Diameter Tolerance:+0.00mm to -0.02mm.