Fewell Masonry Drill Bits 10 Pcs, Concrete Drill Bit Set Size 3/16" To 1/2", Product Details ?Alloy ?Concrete drill bit is made of high cobalt , which is more advanced than YG6X, which increases wear-resistance and extra longer life span, so that the drill bits last through multiple uses. ?ACCURATE AND PRECISE?: Precision unique cross angle design ground spear tip reduces bit skating and walking; superior tile cutter run through ceramic tile like butter, extremely neat and fast. ?Size Information?Cement drill bit set Includes 5 different sizes: 2* 3/16? (5mm), 4* 1/4? (6mm), 2* 5/16? (8mm), 1* 3/8? (10mm) and 1* 1/2?(12mm). Easily meet variety of needs. ?WIDELY APPLICATION?: Tile drill bits for Glass, Ceramic, Tile, Mirror, Plant Pots, Wood, Porcelain, Brick Wall, marble, thin iron plate etc. Please try to keep the drill vertical and keep bits cool with a flow of cooling water; DON?T use on hard tile. ?QUICK CHANGE?: 1/4? Hex Shank fits into all power tools more easily and securely; compatible with Milwaukee and other general electric hand drill, bench drill with locking into quick change chuck. 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.