The Genesis Pro Diamond Hole Saw from the Pro-Wet Revolution range are suitable for drilling porcelain, marble, granite and travertine.
They have an electro plated diamond rim along with a discharge hole for dust removal.
The straight shank means they are compatible with standard drill chucks for ease of use.
On average, you can expect 60-70 holes per drill bit. Available in a range of sizes from 6 – 85mm to suit a whole range of projects.