Speed Tiger Micrograin Carbide Square End Mill - 4 Flute - Ise3/16 4T (5 Pieces, Product Details ? APPLICATION - Our carbide tools are highly effective at machining various types of steel such as Carbon Steels (~HB225), Alloy Steels (HB225~325), Pre-hardened Steels (up to HRC45), Hardened Steels (HRC40~56), and Cast Iron. ? AlTiBN COATING - This coating, made of titanium aluminum boron nitride (AlTiBN), offers exceptional stability at high temperatures and surpasses the heat resistance of TiAlN, TiN, or TiCN coatings. ? 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.