2Pcs 1/2'' Carbide Square End Mill Bits Set, Milling Bits Cutter 1/2, 2Pcs 1/2In Product Details Package Included: 2pcs 1/2" carbide square end Mill Material: Made of micro grain carbide. Carbide has higher hardness and wear resistance and excellent cutting performance than high-speed steel. Coating: AlTiN, high aluminum content provides excellent hot hardness and oxidation resistance. HRC 45 deg :carbide end mill tools excel at working carbon steels (~ HB225), alloy steels (HB225 ~ 325), pre-hardened steels (up to HRC45), hardened Steels (HRC40 ~ 45), cast iron. Flutes:4 Flutes,high rigidity ,widely used in shallow slot,profile milling,and finish machining. 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.