"Unbelievable. 11mm thick grade 5 porcelain tiles. Hole 16 drilled as good as hole1. Tip is still gritty and sparkly, like new. Everyone dreads last day on a bathroom job when the customer brings a box full of accessories to fit. No problem with this amazing piece of kit. Nothing else I've tried (10 years) comes close."
"Not the cheapest bit but I've done 25 holes so far in very hard porcelain tiles with no cracks. Its starting to show signs of wear but with patience is still cutting holes. I borrowed another bit off my plumber and burn't it out in one hole and continue to use this bit. I'd certainly get another if I were fitting another bathroom out."
"I've only used the drill bit on one job (10 holes) which was 10mm ceramic tiles. The drill bit went through very quick and clean however not very easy to start the drilling as the bit wouldn't stop wandering. I found myself using an old ceramic bit which still starts the holes effortlessly to mark all holes, then swapped to the Marcrist."
"Buy more than one of these if you have a reasonable amount of drilling to do. They cut brilliantly and dont appear to get too hot.... until they suddenly glow red and its all over.
I am trying to install bathroom accesories onto very hard porcelain tiles. I have 14 holes to drill in total, I have 10 drilled and I have 4 to go, all done realtively easily but i have burnt out two bits already. I plan to go a little easier on the last 4 to see if its operator abuse.... I am going to buy another one for sure... but its about £5 per hole so far. Makes golf seam a bit more reasonable.
Its still worth it, best tip is avoid tiles this hard in the future...."
"I've tried cheap bits and more expensive Armeg bits, on porcelain tiles before and they've been useless after a dozen holes and very very time consuming. Bought one of these to try, have fitted 2 bathrooms, equalling 30 holes in grade 5, 9mm thick porcelain. As an added bonus using an electric drill for constant power each hole took a maximum of 2 mins to cut. Will never buy anything else."
"Bought this bit after wasting time and money on conventional tile bits, it worked a treat and went through my porcelain tiles a lot quicker. The only disappointment was that I only got 16 holes out of it and not the claimed 30-70 holes which doesn't make it very good value for money!! The porcelain tiles I have are very hard though so perhaps that's a mitigating factor. Without it though I wouldn't have been able to complete the job."
"Having gone through a few bits for the bathroom decided to speak to the team at Screwfix. They recommend this product and I went for it. it does exactly what it's supposed too, once you got the starting angle right you're off."
"Due to the many positive reviews on Screwfix I bought this drill bit to drill holes in cheap porcelain and china plates. I'd used cheap drills on these plates before and none had done more than 3 plates ( at £2 for 3 drills ). However, after five plates the Macrist was beginning to struggle. The diamonds on the tip were wearing whereas those further back were still pristine. After seven plates the drill was nearly useless and couldn't even break through the glaze. So I used a standard 6mm masonry drill, without hammer, to break the glaze and then managed to get another 3 plates from the Macrist. At this stage it would have struggled to break through butter. Therefore the cost was approximately £2 per plate. I have never wasted this much money on a drill before and will never do again. My advice - avoid at all costs."