Speed Tiger Carbide Spiral Router Bits Down Cut - Ised1/4? Diameter, 1? Cutting Product Details ? APPLICATION - Our carbide tools are highly effective for working with Wood, Aluminum, Copper, MDF, Carbon Steels (~HB225), Alloy Steels (HB225~325), Pre-hardened Steels (up to HRC45), Hardened Steels (HRC40~45), and Cast Iron. ? HIGH-PERFORMANCE MATERIAL - Crafted from micrograin carbide, this end mill offers exceptional toughness, durability, and machinability, delivering outstanding performance and great value for its price. ? MULTI-SIZE - No matter what project you are working on, you can find the right size mill bits in our products to work better. (1/4", 1/2", 3/8", and 1/8") ? FINE WORKMANSHIP - Our products deliver outstanding high accuracy with an error of -0.02mm, empowering users to achieve professional cutting quality effortlessly. ? DEDICATED SUPPORT - Feel free to reach out to us via Amazon for the Cutting Condition Data, ensuring you get the most suitable product for your needs. 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.