Shdiatool Diamond Drill Core Bits 3/4-Inch Hole Saw Cutter For, 11 Angle Grinder Product Features Serrated Design: diamond hole saw has saw-shaped teeth on the top to ensure sharp teeth and fast drilling speed. The openings between the sawteeth are neat, and there are multiple chip removal grooves, which can quickly discharge dust during the drilling process and is not easy to block, thus improving the work efficiency. The core bit is designed for Drilling a hole to porcelain tiles, ceramics, marble, granite, stome,etc. Diameter 19mm(3/4"), 5/8"-11 connection, diamond height 10mm, total length 60mm, diamond grit #35/40; the recommend speed is 6000rpm, the max speed is 11000rpm Advanced technology: All brazed hole saws are treated by a special high-temperature resistant process. they can withstand the huge heat generated by the hole saw when it rotates at high speed. Water can be an additional coolant to extend the service life. Vacuum brazed technology provides excellent drilling strength for high-precision and smooth cutting, and the drilling is stable and fast. The hole saw is easily operate on 5/8"-11 Angle Grinder; Need an adapter for drill or other machine, such as SDS,hex,Round plus shank Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!