{Vacuum Brazed Diamond CoreDrill Bits} 1/4 Inch (6mm) Porcelian Tile Hole Saws Vacuum Brazed Diamond Drill Bits, Diamond height 10mm, Total height 62mm. {High Quality} Diamond Hole Bits are made with high-strength steel and high quality diamond grain. The Vacuum Brazed Diamond Technology makes diamond hole saw more heavy duty and wear resistant than electroplated diamond bit, provide high efficiency, cuts faster, durable and sturdy. {Wide Application} Diamond Hole Saw is great for drilling clean holes to tile, ceramic, granite, marble, masonry, concrete, stone, brick and normal stone. {Drilling method} 5/8-11 thread diamond core drill bit can work with Angle grinder directly and with the 3/8" hex shank adapter can be used in Electric Drills.