Accucut I4Kes 1/4? Carbide Square End Mill - 4 Flute Milling Bit For Steel, Product Details General Usage: Applicable with copper, copper alloys, cast iron, steels, carbon steels, alloy steels, pre-hardened steels, hardened steels, and stainless steel materials. Best use for materials HRC less than 50. Solide Carbide: The material is European origin ultra fine grain carbide. We use the highest quality tungsten carbide powders and adjust the ratio of tungsten carbide and cobalt to meet the ideal hardness. It is stable and has excellent wear-resistance of the material. It significantly enhances the tool's lifespan and keeps the end mill sharp. It also helps keep the surface quality of your work-piece at the best level possible. AlTiN Coating: It is a strong coating that's coated at temperatures between 450C to 475C. It is able to provide high wear resistance, lubricity, exceptional oxidation resistance, extreme hardness, and excellent abrasive wear resistance. It has higher reliability in dry operations, heat resistance, hard machining, and the resistance can be reduced. 4 Flute Cutter: It has uniqe geometry and strong cutting edge. 4 flute is great for speedy cutting. Ideal for planar, step, groove, forming surface while the 45 degree helix design can perform smooth surface finish, better chip removal control than those with lower helix degree. 45 Helix: Specifiaction - 1/4" diameter, 5/8" cutting length, 2" overall length, 1/4" shank, 45 helix degree 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.