Snzo Diamond Hole saw

This diamond hole saw set is for use cutting ceramic tile, hard stone, granite, marble, brick and concrete block, and glass. Do not use on with a hammer drill. For extended life reduce drill speed, reduce drill pressure, and increase water lubrication. Do not use with a hammer drill | For extended life reduce drill speed, reduce drill pressure, and increase water lubrication | USES: Ceramic tile | Hard stone | Granite | Marble | Brick and concrete block | Glass |