Dry Diamond Drill Bit Set,BGTEC 10pcs 1/4" 6mm Hole Saw for Granite,Marble,Masonry, Concrete, Tile/Ceramic, Glass, Hard Plastic,Vacuum Brazed Diamond Core Drill Bit Kit

These worked well drilling through 1/2 " tile, 1 bit worked great for 6 holes before I changed out for a new one. I would say these hold up pretty well, are well made and worth the money. Go slow and keep water to it and they will last for a good amount of boring holes. I did use a smaller pilot to start a hole, then used this to round out the spot before plunging in so not to stray off course.

Was able to drill 5 holes with one bit and it's still going strong. Way better than normal for the wax filled type.

So... Great value overall, especially if you're coming from higher end diamond bits for porcelain tile. I've always used Milwaukee (1 bit for a little more than I paid for these). For porcelain, I don't engage the hammer, I'm always in 2nd gear and I usually run between 3/4 and full speed on an m12 fuel hammer drill (again, not in hammer). On the Milwaukee's, I can get a good dozen to fifteen holes out, about 2-3 minutes a piece with 3 stops per hole before the bit slows way down.These are like 5-6 minutes a piece, maybe 6 holes max (you'll see) with 20 second stops per hole. You can feel, see and smell the bit start to get hot way early.And they wobble a bit. Not much, not enough for me to worry about, but you definitely have to back way off on pressure and be dead nuts on level or you'll end up with a larger hole than intended. Just dip them often, wipe them off and dip them again and keep everything wet. I wouldn't say go slow, just go a little lighter than normal on pressure. And treat them like a plunge router bit.Hit a stud and these will glaze over to the point of useless. So keep that in mind.Overall, I'm not upset. The price is right and even for the lost time I come out ahead in small projects.And I can quit trying to find the hard to find Milwaukee bits that I love now (and save the ones I have for larger projects).

Wow!!! 4 holes with a single saw bit in under 5 mins thru hard porcelain wall tile. The last hole did take a bit longer then the first as it the bit I imagine began to dull out a little bit. But a HUGE time saver!!! It would take me more than 30 mins with wet saw bit (and a helper spraying water and clean up) and possibly 2-4 bits. These saws rock and for the price, even if they only last each 5-10 holes, they would pay for themselves in reduced labor!! Recommend for DIYer!!!!!

I was attempting to drill 12 holes into a brick wall to hang a large TV. I can't use a hammer drill because it'll break the brick. I used a regular drill and a carbide masonry bit...3 different ones and after an hour or so I made one hole. That's wasn't reasonable. I searched for something different and it led me here. I had spent probably $50 on several other bits that weren't working until I came across these. Once I got them I immediately tried them out....or one I might add. It worked so good that only one bit drilled all the rest (11) of the holes. Took about 3 minutes to drill one hole compared to an hour.TIP: If using in brick, drill speed at a medium speed and medium pressure. More pressure for less speed. Don't allow the bit to get hot. Drill for 20 seconds and dip the bit in water to cool. Dry it off and repeat process. It works very well if you keep patience. Avoid using water for lubrication unless it can be fully submerged. A dry bit is fine as long as it isn't getting hot.NOTE: This bit is NOT designed for metal of any kind.Good luck!

First of all, these bits are priced very reasonably. In the big box stores you might get 1 or 2 at most for the same price. I am a tile contractor and have used many different bits to drill through tile for installing grab bars or shower doors. These bits drill or grind their way through a hard porcelain tile quite easily. I start my holes by marking the spot to be drilled, etching a small starting point for my bit so that it is less likely to travel on the tile surface and then starting my bit at an angle till it begins to drill through the surface at which time I hold the bit vertically. I drill for about 10 - 15 seconds before dipping my bit in a bucket of water and putting a little water in my hole, keeping the bit cool and also extending its life. I do this approx. 4 times before the hole is completed. The bit is actually grinding a hole versus drilling a hole. I am very happy with these bits and will reorder in the future.

Used one bit to drill 12 holes in tile to hang a heavy shower door. The first bit I used is still sharp enough to drill many more holes. I used a spray bottle of water to keep the bit cool and provide some lubrication. The bit never got too hot to touch. I don't use bits like this all the time, so I am probably fixed for life for 6mm diamond drill bits.

Used for grab bar install on porcelain tile walls. multiple restrooms commercial project. As expected, each cut really well first 6-8 holes, became gradually less effective by 12 holes and replaced with new butat $2 / each was not an issue.Likely better results with softer material and dulled bits still are usable. Preferred these to hollow core of same size that plug and overheat quickly & at price was no risk if these ended up disposable or not.