Diamond Drill Bit, Hole Saw Drill Bits Tools Set for Glass/Tile/Ceramic/Marble/Porcelain Cutting, Hollow Core Drill Bits Cutter with Diamond Coating, Carbon Steel 8mm-50mm 10 PCS

Diamond Drill Bit Set.Hole Saws for Glass/Tiles/Ceramic.Good collection of sizes in this set.Work great in my Pillar Drill. Cut a hole in a thick Glass Bottle and it flew through with water as coolant.Worth the price for this set in my view.Nice neat cut (let the Bit grind through,dont force it for best results).Use some masking tape and Pillar Drill to stop Skip. If you have a glue gun use it to build a Dam to hold water for cooling.It peels off after.

Bought on 29 August and used today 16 September. Drilling a 25mm hole into the thick porcelain of my oilet pan/bowl. Before use I read many reviews and complaints about the product and watched a few videos on how to use these drill bits. I sprayed the drill bit and area I was cuting, using lots of water, and I drilled very slowly only picking up speed as I got to about half way. The drill bit got through the toilet pan very easily and only a very slow speed was required. I used a battery operated combi-drill (hammer drill, drill, screw driver) and set it to screw driver mode as this offered the slowest speed. You have to start extremely slowly to get the hole started. The biggest headache is getting the hole started as I found that the drill bit had a tendency to skip across the shiny surface of the toilet pan. So that's when I set the drill to slowest speed and pressed down firmly in order to get the drill bit to "bite" into the material and start the hole. Once the hole was started I reduced the force I was using to press down on the drill such that only the weight of my hand was being used simply to keep the drill and drill bit steady and aligned straight. I learned from the few online videos I watched that even very expensive drill bits of this kind don't last very long. So with that in mind I decided to use a large amount of water when drilling in order not have the drill bit over heat and become useless. Because I was drilling into a flat horizontal surface water application was very very easy. For starters when the drill bit cuts into the surface it creates a trough, a circular valley, and this trough/valley is ideal for water application as it retains the water and the deeper you cut into the material the deeper this trough/valley will be and therefore the more water it will hold. I made up my mind that this was going to be a VERY VERY slow process and that I would be using lots of water. After drilling for a few seconds I would remove the drill/drill bit, then use a spray bottle to spray into the area I was cutting and also spray the drill bit on the inside, and outside of the cutting surface as well as the horizontal edge of the cutting surface of the drill bit; I repeated this process every six or so seconds. I found that doing that water lubrication process meant that the drill bit never got hot and cut through the thick toilet pan/bowl a lot quicker than I was expecting (it was of course a lot slower process than drilling into wood or masonry but all the same it wasn't as long drawn out as I was expecting). The thing to note, as mentioned before, is that there was no need to exert a lot of pressure on the drill; I simply allowed the weight of the drill and my hand in combination with the drill bit to do the work nice and steadily. Working on a vertical surface I would prefer to use cutting oil (or any oil designed to withstand extremely high temperature) as a coolant lubricant because it wouldn't be as runny as water. For the number of times I am likely to use these drill bits (hardly ever) and the number of holes I will need to drill (very few) this drill bit set represented extremely good value for many and there really is very little to complain about other than that it would have been nicer if there was some way of keeping or ensuring the drill bits are centred at a precise point/location (it's quite easy for the drill bit to skip out of your desired location as you start drilling).

Does what its supposed to; best in a bench drill to stop slipping on start of cut

LOTS of items to fit in the bathroom. loo roll holder,towel ring. mirror, spot lights, glass holder, shelf etc ALL needing TWO holes per item probably 10 or more holes. 5 to 6mm holes needed, Found out late that even with frequent water dips these bits burn out quick!! BEST WAY to make them last is hard work , Battery Drill on slow trigger constant water dips!! break off the the little stud in the wall with a fine screwdriver made with these hollow bits. IT SEEMS TO TAKE FOREVER TO DO ONE HOLE DO NOT SPEED UP!! NOW DONE 6 HOLES WITH ONE BIT INSTEAD OF 1 MAYBE 2 UNLESS YOU CAN AFFORD LOADS MORE BITS

Bought these off a tip from a YouTube video. I didn't think they would be very good but they've worked really well. Plenty of sizes in the pack and durable. Why pay more when these do the job. I cut into bathroom tiles with no issues.

I have other diamond hole saws. Saws that bite into the tile as soon it touches it, saws that I bought for similar price from Amazon. I'm afraid the product I am reviewing was a disaster. I should have read the reviews. It appears nowadays anything around 4 stars and below is not good. To start with the saw was bouncing off the surface and leaving black marks on the tile - the kind of marks you will see if you scratch it with aluminum (I am not saying it is made out of aluminum). Then when it eventually made its way through the tile glazing through sheer brute force it was still not as good as other saws. Perhaps if they leave the factory in good condition they shouldn't be dumped simply into a bag of 9 other saw bits that are allowed to rub against each other and damage the diamond plating? Visually they appear to have diamond plating but on a close inspection the diamond is in not in the area where you want it to be. Have they been reconditioned (resprayed to look like new)?

Read the reviews, wasn't sure if I believed them, but because they are inexpensive compared to d.i.y. store chains I decided to buy. Items came rapidly and I used two of the smaller bits to make holes in small china pots for drainage to plant some small plants. Great!! Whereas I had spent 5 mins to make a hole with a tile-cutting blade (triangular tip) and got as far as 1mm , using a drill press, holes were cut in 10 seconds. The pots are about 4mm thick. I used the drill press because it is quite difficult to centre a hole because of sliding. I haven't used the bits above 10mm but I would be confident of a similar result.

These hole saws are decent for occasional use. I've only used the 22mm one on a ceramic tile and it did the job without self-destructing which in my experience is about as much as you can ask of something at this price. I've never had a diamond saw that survived more than a couple of holes drilling through porcelain and I doubt these would be the exception. These look very like a set that was recently on sale in Lidl for almost the same price, albeit with a case. That makes them good value in my book. Weirdly the saws aren't marked with their diameters - you have to figure that out yourself. However, you will note that these saws don't use an arbor. What this means in practice is that it can be hard to get the saw to stay in place, particularly the larger diameters. As the product instructions suggest, you can tilt the drill and cut a little arc with one edge of the saw and then straighten the drill up and hope it stays in place. If you can't take the risk of scuffing or damaging the work area surrounding the hole, the ideal solution is to make yourself a jig for the hole saw to sit snugly into and stop it sliding around. To make the jig, you may well need another drill bit or hole saw that's meant for cutting wood because these certainly aren't. If you can have someone else dribbling water over the cut constantly then all the better. Don't go too fast or you will not only melt the saw but risk cracking your tile with the heat. If you want something that you can pass on to your grandchildren for many happy hours of hole drilling yet to come, I would steer you away from these, in the direction of Lenox, Starrett or Bosch. If you don't need all the different sizes, you may find one quality one in the size you need a better investment but expect to pay more than for the whole set of these.

Gut

Resultaron ser muy resistentes, los recomiendo.

Ho comprato queste tazze diamantate x prova x forare piastrelle e devo dire dopo lo scetticismo iniziale x il prezzo e la quantità di frese sono rimasto veramente colpito in positivo! Bucano le piastrelle come burro io ho bagnato tramite uno spruzzino mano a mano che girava x abbassare la temperatura comunque sono rimasto molto soddisfatto! Certamente non aspettatevi di bucare all'infinito dopo 4/5 fori cominciano a fare fatica e poi non vanno più xò x uso hobbistico sono accettabili.. Ottima la spedizione Amazon prime in un giorno consiglio

Très bien prix abordable

Mauvaise qualité je ne recommande pas