Product Review

Drill bit sizes - 10,14,16,18,20,26,32,45,50MM Nickle plated - Diamond coating Great for drilling holes in marble, Slate, Glass, Tile etc. Drill bits will work with both 3/8-inch and 1/2-inch drills (Drill not included). Diamond style drill bits are the preferred drill bit for use when drilling ceramic, glass, granite, marble, and many other hard materials. Diamond drill bits are manufactured with a one piece body design to reduce cracking and fatigue caused by stress, and pressure. Professional grade diamond substrate bonding is employed in the design and manufacture of our diamond drill bits to provide extended life and reduced chipping when working with delicate materials. Using diamond drill bits requires liquid cooling of the working material when drilling. IMPORTANT: ALWAYS USE WATER TO COOL THE MATERIAL YOU ARE DRILLING.