Troxell 21-BB14 1/4" Diamond Core Drill Bits This ball drill bit is a departure from the conventional masonry drill bit, featuring a hollow design. The cutting surface is coated with industrial diamonds and can be used wet or dry. (It is always recommended to use water when possible to prolong the life of your diamond products.) The main advantage of this drill bit is the precision it provides in hole placement and a cleaner edge without chips or burrs. Other sizes are available.
