Kowood Pro Countersink Drill Bit Set #4, 6, 8, 10, 12, 5-Piece For Wood,High Product Details Mutiple sizes-Includes 5 Gold Screw Countersinks: 5/64?x3/8?, 3/32?x3/8?, 7/64?x3/8?, 1/8x3/8? 9/64?x1/2? Quick change-The 1/4" hex shank can be used with power drills and quick-change chucks. Durable ? High-grade carbide tipped, fully sharpened edge, quick drilling, easy to use, in longer life Suitable for woodworking-Compatible with drilling machines with chucks, used to drill holes on wooden boards or wooden floors Precise punching-punching can be done quickly and accurately. The external thread design can help discharge waste when drilling, so as to ensure successful drilling 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.