1 3/8 Inch Diamond Hole Saw Diamond Drill Bit Tile Hole Saw Ceramic Porcelain Quartz Granite Installation Removable Center Pilot Drill Bit Locator Pin

Instructions: Step 1: Start drilling with Center Locator Pilot Pin.

Step 2: After making 1/8 inch depth initial marks, REMOVE THE CENTER PIN Step 3: Add more water for cooling Step 4: Continue drilling WITHOUT THE CENTER PILOT BIT Triangular shank GREAT RESULTS with Quartz, Granite, Ceramic & Porcelain Tiles, Glass, Marble, and many types of Stones.

1-3/8 inch Depth of Cut (goes through 3cm thick countertops)St