5Pcs 1/4" Solid Carbide Square Nose End Mills Set 65Hrc Tungsten Steel Milling Product Details Package Included: 5pcs square nose end mills, each is individually packed in a plastic storage box. Cutting diameter: 1/4inch; Shank diameter: 1/4inch ; Flute cutting length: 3/4Inch; Overall length: 2-1/2Inch. NACO Coating: NACO coating can improve the oxidation resistance,high temperature resistance and wear resistance of the workpiece. The hardness of the coating can reach 4500HV, and it has strong wear resistance.it's service life is five to six times longer than other coated tools. Strong and Durable: Milling cutter is made of tungsten carbide material, it is high-wearable and has a long life; 4 flutes 45 helix angle design,great for speedy cuttingSmooth cutting and fast chip-removal, gives outstanding cutting performance and wear resistance. Application: AYCHOLIZ End mill bits are suitable for side milling, slot milling,step milling,drilling, etc.Suitable for carbon steel,alloy steel(HRC50),PH Feritic,Martensitic steel,Stainless steel,High hardness steel(HRC63),Superhard material(HRC65),etc. Tips: AYCHOLIZ End mill bits are compatible with most desktop CNC machines, as well as other industrial CNC machines. Just make sure you select the correct-sized collet for your device. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.