Speed Tiger Solid Carbide Cnc Spiral O Single Flute End Mill - Iap1/4 Diameter Product Details ? APPLICATION - Our carbide end mills are highly efficient in handling various materials such as Wood, Aluminum, Copper, Plastic, Brass, Carbon Steels (~HB225), Alloy Steels (HB225~325), and Pre-hardened Steels (up to HRC46). ? ZrN COATING - The Zirconium Nitride (ZrN) coatings make it exceptionally durable, improving wear resistance and effectively reducing built-up edges while machining. ? HIGH-PERFORMANCE MATERIAL - This end mill is made from micrograin carbide, which gives it exceptional toughness, durability, and machinability. It performs brilliantly and is an excellent value for its price. ? FINE WORKMANSHIP - Our products deliver outstanding high accuracy with an error of -0.02mm, empowering users to achieve professional cutting quality effortlessly. ? DEDICATED SUPPORT - Please don't hesitate to contact us on Amazon if you need the Cutting Condition Data. We want to ensure you receive the best product that meets your requirements. 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.