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You can add or remove carbide cutters to match the grout line thickness (more cost for extra blades).I used the Grout Grabber to repair about 25 16"x16" tiles. The high price, especially for replacement blades, has always given me cause for pause. 2 blades were used for the entire job. When the outside edges became worn, I swapped the blade positions to use the fresh edge.You have to be mindful of the blade position as you cut, so that you don't mar or damage the adjacent good tiles.
The blade attachment bolts will scrape and damage tile if you cut too deeply. Keep the shop vac close by to remove the grout dust, and keep the cutting line clear.The Sawzall might be a bit heavy for protracted wall work. You also have to be mindful of how deep you cut. I think the Fein tool looks like a fine piece of equipment. Amazon has the Grout Grabber for about $15. The broken tiles were not next to one another, so I had to cut 64 linear inches per tile. A steady hand and diligent eye will go far towards avoiding problems.
Since my projects are all personal home projects, I think I can put up with a lot of discomfort for the cost of a Fein, blade. With respect to grout removal tools, I recommend the Grout Grabber as a lower cost, but very effective alternative, if you happen to have a Sawzall, or equivalent saw. The blades were installed back-to-back on the tool. If I was doing this for a living, and I could pass the cost to the customer, I think I would take the Fein plunge. It is possible to jump out of the grout line early in the cut, if you're not careful.
I've found nothing better for removing tile grout. I'd like to know if something better (faster and longer lasting) exists. We can clean at least 10 standard tile tub surrounds with each blade - more or less. About $10 a surround.
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