Akozon 5Pcs M3-M8 Slotting Counterbore End Mill Cutter Solid Slot Countersink Product Details ?Main purpose?: Countersunk end mill is a specially manufactured tool, mainly used to cut holes that allow bolts or screw heads to be screwed into. ?High precision?: The cutting hole and bottom hole of this tool have high alignment accuracy. Because of its high production efficiency, it is often used in the machining industry. ?High-quality and ?: The Counterbore End Mill Cutters is made of hard high-speed steel, with high toughness, wear resistance, and high hardness for high-speed cutting; it is usually used for assembly on a milling machine. ?More time-saving?: Countersunk cutters reduce the time to change tools, improve the efficiency of machine actuator movement and save manufacturing time. ?Wide range of applications?: Counterbore bit set is suitable for milling of copper, aluminum, steel, cast iron, etc., and can be directly processed or finely processed to heat treatments. 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.