Review on Complete Hole Saw Kit With Diamond Drill Bits And Adjustable Guide Jig For Glass, Ceramics, And Tile - 15 Pieces, 6-50Mm Size Range by George Robinson

I'll be trying these next week and I'll revise my review if they're not up to par.Looks like a nice set though.Hopefully if I take it slow as per the directions, they'll be great.UPDATE: I had the opportunity to use these a couple of times now.The first was a freak situation where I had to enlarge the faucet holes in a china pedestal sink deck.I took my time and started with a saw that just fit into the top of the hole while squeezing water from a sponge into the top of the hole as I went.It only took a few seconds to get through and made a clean hole.Unfortunately, it was still a little too small, so I stepped up one size and repeated the process.Again it worked perfectly, and this time the faucet fit .I used them again a few days ago to cut holes in some ceramic wall tiles for tub and shower pipes.This time I had a chance to try the guide.As others have said, it's important to make sure the suction cup and tile surface are clean so the suction cup sticks.But it worked beautifully and gave me perfect, clean and professional looking round holes.I still haven't tried them on porcelain tile which is harder than ceramic and more difficult to drill and cut. But since they went through the ceramics like butter, I think they'll be fine as long as I don't try to rush it.