Superior Speed & Smoothness:They are specifically 4 flute square end mill for speed and smoothness in cavities milling, slotting,plunging, 3D contouring, finishing, profiling, facing and pocketing operations,making them the perfect choice for various machining tasks.sqaure cutters provide enhanced chip clearance,ensuring efficient removal of debris during high-volume,the both edge sharpness and finishing surface quality can restrain the horizontal fringe.4 flutes square end mill provide enhanced chip clearance, ensuring efficient removal of debris during high-volume, high-speed plunging,slotting,pocket milling for mould,die,valves,pumps,tool making,and automotive. Meticulously designed:High cost performance Square milling tools,Designed to tackle the toughest materials, our special carbide mill bits are optimized Hardened Steel , Stainless steel, high-hardened steels, titanium alloys, inconel, nickel alloys, and other high-temperature materials. With their exceptional performance, these square end Cutting tool excel in difficult-to-machine steels, stainless steels, machining tools and tool steels.(Up to 65HRC) Durability and Heat Dissipation:High hardness tungsten steel material, capable of withstanding high-intensity cutting,The nano coating applied to these end mills further enhances their resilience, providing superior heat dissipation even at high speeds.durability and perform optimally throughout the fast milling process. Precision design and manufacturing:crafted with pinpoint accuracy;cutter tolerance: -0.01mm(-.0004 inch).the h5shank ensures a snug fit in your machine.workpieces will meet the tightest specs.quality control tests before leaving the factory. Cutter Size:1mm Mill Dia-3mmLg.of Cut-4mmShank Dia-50mmOAL Package:1pc;Multiple sizes and hardness CNC Router Bit to choose, catering to different work requirements 1.Guaranteed Quality:Our end mills are subjected to rigorous quality control tests before leaving the factory. Each end mill is inspected under high magnification to ensure that it meets our stringent standards. 2.Precommend for pocketing copy milling,cam profiling,die sinking and slotting,processed good surface roughness 3.Make sure work piece and machine are stable,use hydraulic chucks,high qualitycollet chucks,or shrink fit chucks. 4.Please adjust the speed,feed and cutting depth according to actual cutting conditions. 5.when the tool overhang length is longer,please adjust the speed.feed and cutting depth.