Uxcell 85Mm Diamond Coated Glass Hole Saw Drill Bits For Ceramic Tile Marble Product Details SIZE - 85mm(3.3-inch) Drilling Diameter, 10mm(0.4-inch) Shank Diameter. The hole saw achieves high precision and smooth cuts without edge breakage, with good toughness and high strength. DIAMOND COATED - Diamond coating enhances the drilling speed, which makes the bit more sharp.Electroplated diamond is uniform and more wear-resistant. NICKEL PLATED SURFACE - Nickel plating surface can extend the service life and enhance the surface corrosion resistance. Diamond coating maximizes performance and retains a sharper cutting edge than traditional carbide or bimetal hole saws. SPECIAL DESIGN - The diamond hole saw with clearance hole facilitates the entry of cooling water and the escape of chips from the drilled hole. Makes the drilling process easier. Not suitable for drilling tempered glass, plastic and wood. APPLICATIONS - Perfect for drilling glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, light stone and fiberglass. (Need to be used at a low speed; Always use lubrication (water) when processing, otherwise the hole saw will burn.) 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.