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Diamond Drill Bits, 10Pcs Hole Saw Diamond Drill Bit Hollow Core Drill Bit Set for Diamond Coating, Carbon Steel for Glass, Ceramics, Porcelain, Ceramic Tile, Marble, Diamond Drill Bits for Glass Ceramic Tile Porcelain Hole Saw Cutting 10 Bit Set✔ Ideal Application - This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.They are perfect for drill glass, tile bottles,blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone✔ Super Material - These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.✔ Sharp&Smooth Cut - Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably✔ Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or for depths beyond about 1/2".Features:--100% brand new and high quality.--Can be used with a standard electric drill.--Always use lubrication (water), otherwise the diamond core drill will burn.--Materials and only needs water for lubrication.--This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.Material: SteelUse note:Start your hole diagonally, make a round trace and then hold drill straight.Package includes:Diamond Holes Saw Drill BitsShipping is FREE to all addresses other than APO/PO boxes in the lower 48 states. Our stock all ships from our US-based warehouses. Shipped via USPS or UPS (depending on location and package weight) Unless stated otherwise, all orders will ship within 24 hours of your payment being processed. Check our feedback to see the great reviews of FAST shipping we offer. PAY SAFE: PAYPAL PAYMENT IS ACCEPTEDWe offer a 30-day return policy for our products.We stand behind our products. Items can be returned for exchange or full within 30 days from the date you receive your merchandise. We are not responsible for any purchase after this 30-day period.Return shipping is the responsibility of buyer unless the return is a result of our mistake . We will pay for shipping back to you if an exchange is requested.If you have any questions please through "Ask seller a question" link. We will respond within 1 business day or less. All returns must be done within 30 days of the date of purchase. Please note that we cannot give s after the 30 day limit has expired. When sending in a return, please note that it can take up to 7 business days for the return to be processed. We do our best to process as quickly as possible.DELIVERY TIMESDomestic lower 48 free shipping is expedited. We have many different shipping locations depending on the product you buy and the shipping location that you choose. We try to ship most items within 24 hours of payment Monday-Friday. Most orders are in transit for two days but some may take longer. If you have a specific time frame please before you make the purchase.