Hhip 5823-0312 2 Flute High Speed Steel Single End Center Cut, 5/16" X 3/8" Tin Product Details HHIP 5/16 X 3/8 X 3/4 X 2-1/2" 4 Flute M42 Cobalt Fine-Pitch Roughing End Mill Cutting diameter is 5/16". Shank diameter is 3/8". Cutting length is 3/4". Overall length is 2-1/2". Ground From Solid M42 Blank. 8% cobalt. Center cutting. Low co-efficient friction. The pressure of the cut is distributed over many teeth. Recommended for high production milling in difficult-to-machine materials such as inconel, hasteloy, titanium alloys and other materials up to RC 40. With a Weldon flat, a flat section on the tool shank, used to hold the tool in place by set screws within the body of the holder. Ground From Solid M42 Blank 8% cobalt Center cutting Recommended for high production milling in difficult-to-machine materials such as inconel, hastily, titanium alloys and other materials up to RC 40 The pressure of the cut is distributed over many teeth 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.