Vitrex Diamond Drill Bit and Adhesive Coolant System. Suitable for all hard tile type. Bit size 35mm. This system uses self-adhesive pads for secure positioning and provides the necessary lubrication to extend the life of the drill and cool the drilling surface.
Used to cut a hole in a granite composite sink which it did easily. Could not use the supplied water holder as it was too big in this case, but keep the area wet when drilling (once the hole is started the water is held anyway).