Diamond core bit:

Diamenter: 10mm - 159mm

Thread: M14, 5/8-11, Etc

Usage:

1)Core Bits are made to drill a variety of aggregates including concrete,asphalt,granite,marble,masonry or natural stone.
2)Core Bits can be used to make any type of opening.
3)Coring continuous holes,commonly referred to as stitch or line drilling,creates the shape of the desired opening.
4)Most coring bits can be run by an electric drill motor ranging from 1/2" to 12" diameter,powered by a minimun 120 volt 15 Amp.