"Bought this to rake out some lime mortar, did a good job and much easier and safer than a grinding disc! And also doesn't damage face of bricks if you do have an inevitable slip! Does wear out fairly quick (have used three on one side of a house) so not the cheapest way to do it but certainly quick!"
"I bought this to chop out a row of bricks so i could fit a cavity tray, The instructions said to drill a 10mm hole and insert the rake into the hole, I found it a bit slow so i ended up drilling a series of holes along the mortor and then found the tool cleared out the remaining mortor. It also doesn't quite reach to the back of the brick so had to chop out the rest of the mortor by hand. On the plus side it causes less dust than an angle grinder which saves time on clearing up at the end of the job."
"Worked very well to start and removed the mortar exceptionally quick. Unfortunately at £18 it did not last long. I managed to rake out approx 20-25 joints to tie some new brickwork in to an opening that was being blocked up and didn't quite get to finish due to the carbide bits wearing out so quickly. I think this may have been more due to when it touches the bricks in the joint and rips the carbide bits from the stem. To be fair it made the job very quick taking about 15-20 mins to complete the joints I did, but for the price it is very expensive and would have needed two to complete the job which in real terms was very small."
"Slow going, but then again my mortar is VERY hard, real man's mortar! Probably works best on soft crumbly material, or possibly old lime mortar. At least it didn't break like some reviewer's examples, but in places the carbide material has worn away. Only advice I can give is to read manufacturer's instructions re: only use for 5 mins then stop."