⚡ Cut through grout like a pro—fast, precise, unstoppable!
PRECISION IN EVERY CUT - 1/8-inch carbide blade designed for tight grout lines and detailed work
SPEED MEETS EFFICIENCY - Operates at up to 21,000 oscillations per minute for rapid, smooth grout removal
UNIVERSAL COMPATIBILITY - Fits Bosch, Makita, Milwaukee, Rockwell, and Dremel tools with Quick-Fit interface
DURABILITY YOU CAN TRUST - Premium carbide construction ensures long-lasting performance on tough grout and stone
SUPPORT THAT HAS YOUR BACK - USA-based customer service ready to assist via chat, email, or phone
The Dremel MM500 is a 1/8-inch carbide oscillating multitool blade engineered for fast, precise grout removal. Compatible with major oscillating tool brands via its universal Quick-Fit system, it delivers up to 21,000 OPM for efficient cutting. Built for durability and backed by USA-based customer support, this gold industrial-grade blade is your go-to for remodeling and restoration projects.
this is not a fun tool to use, like a chainsaw, but it gets the job done. i removed the grout on 24 square feet of bathroom shower wall between 4x4 in. tiles in 3 evenings/nights (w kids and a job, you find time to work when u can). these are smallish tiles, so the task was tedious, and the dremmel, as you probably know is loud - plus its dusty work in a pretty small space, so not a fun job. but our old grout cracked in some spots, and was allowing water to leak through the tiles, so it had to be done.the 1/16 in blade fit between the tiles quite well, and our grout lines were very thin - in a lot of places, it eroded the edges of the tiles a little, but even those places look great, and held the new grout without a problem.inspection of the blade itself after the job shows zero wear and tear, i would predict that for removing grout, this blade will outlast the dremmel itself, and could easily handle a bigger job than our humble bathtub walls.if you have old, thin grout lines, and its time to redo it, this is the tool.we had some damage behind the tiles that required installing new drywall, so this project turned out to be a little bigger than i hoped, but i was expecting that. in summary, this project ended up looking great, the grout blade saved me a lot of time versus removing it buy hand. i estimate a tile pro would have charged us somewhere near $500 bucks for the whole job, and i spent about $100 on thinset, grout, drywall etc. i saw this blade in several stores, but the amazon price was $10 bucks cheaper (got here in about 4 business days), so overall, there's a couple bucks i can reinvest back into some other project - homeowners know, they're never ending!!
L**H
grout removial
works well
I**N
Tedious for non sanded grout
I have non sanded grout in my master bath 1/8 in or so. It took along time for the blade to cut through the grout. I've seen many amateurs use it on Youtube and it cut through like butter. Perhaps it work better on sanded grout. Let the tool do the work. Don't put alot of pressure on the grout. You'll dull the blade prematurely.The best feature is you can attach it flat side out and get all the way into the corners.
N**N
Good for more than grout removal...
I've used a few different brands of these grout removal tools. Just for comparison, I also used a Harbor Freight version as well as a Bosch. (And just an FYI, the tool I'm using this with is a Harbor Freight pneumatic multi-tool, which has proved to be an exceptionally useful tool for the twenty-something dollars I invested in it.)Where this Dremel version stands out is its "square" corners and its beefy construction. The corners make it easy to get into the tight corner spaces which proved difficult with the other tools, and the thick construction is better than the rather thin HF bit which, after time, begins cracking where the metal bends flat to the base.Grout removal is quick -- just have a vacuum ready. It won't eat into the tile unless you really are trying to grind into it, so you'll end up with a clean, grout-free groove to caulk or re-grout.I've also used this to strip down a layer of thin set mortar down to the backerboard, for reapplication of tiles. It's not the fastest job, but I haven't figured out a better way of doing it. I just had to use a lot of care because the bit eats into the backerboard faster than the mortar, though the resulting grooved surface doesn't result in any problems, and probably help in adhesion of the re-application.It's also a good bit for cleaning up exterior stucco slop.As for value, I can buy 2 or 3 Harbor freight bits for every Dremel bit, but the HF bits have not only the breakage problem after about an hour of use, but also wear a bit more quickly and don't have the squared-off corners to get into the grout corners (where a wall meets another wall, or where a wall meets a horizontal surface.If it weren't for the corners, I'd probably give this a 4-star rating (due to usefulness for value). For instance, if you're re-grouting an entire flat wall or floor, use there's money to be saved by using HF for most of the work, and this bit for the tight areas.
W**R
Did the job on my shower tile rehab
This was perfect for my Dremel 6300 multi-tool. Another carbide blade which was advertised on Amazon as compatible with Dremel did NOT fit the 6300, so watch out if you are thinking of ordering one of these 3 for 1 blade deals. I used this to rehab the grout in the tiles in my shower and it worked fine. Made an easy job out of the drudgery that would have existed with a hand grout saw. I highly recommend this blade.
J**E
Great tool
Used this on my dremel multi max to regrout my bathroom - and it’s incredible. Removes grout quickly and easily, and it never seems to wear out.One thing - if your tiles are set closer than 1/16” apart, as mine are, it will cut into the tile. For me this wasn’t a problem - I have white tiles and I used white grout, so you can’t really tell the tiles were cut into a little. In fact, I now have even spaces between the tiles throughout the bathroom, so it ended up a positive.I would just say go slowly and let the machine do the work. If you apply too much pressure, you will chip your tiles. Position the machine so that your view of the blade is clear, and keep the blade moving in a straight line along the grout line, and avoid hitting the edge of the tile.
D**C
Doesn't fit Dewalt
Does not fit DeWalt oscillator
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Zainab N.
Fantastic and great service. Shipping was faster than expected.
1 week ago
Yusuf A.
Fantastic experience overall. Will recommend to friends and family.
The Dremel multimax represents the newest in a long line of high speed rotary tools and accessories. Its ease of use, precision, versatility and problem solving capabilities make the Dremel multimax system the perfect tool for crafters, hobbyists, do-it-yourselfers and trade professionals.
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It took along time for the blade to cut through the grout. I've seen many amateurs use it on Youtube and it cut through like butter. Perhaps it work better on sanded grout. Let the tool do the work. Don't put alot of pressure on the grout. You'll dull the blade prematurely.The best feature is you can attach it flat side out and get all the way into the corners."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"N***N"},"datePublished":"February 16, 2011","name":"Good for more than grout removal...","reviewBody":"I've used a few different brands of these grout removal tools. Just for comparison, I also used a Harbor Freight version as well as a Bosch. (And just an FYI, the tool I'm using this with is a Harbor Freight pneumatic multi-tool, which has proved to be an exceptionally useful tool for the twenty-something dollars I invested in it.)Where this Dremel version stands out is its \"square\" corners and its beefy construction. The corners make it easy to get into the tight corner spaces which proved difficult with the other tools, and the thick construction is better than the rather thin HF bit which, after time, begins cracking where the metal bends flat to the base.Grout removal is quick -- just have a vacuum ready. It won't eat into the tile unless you really are trying to grind into it, so you'll end up with a clean, grout-free groove to caulk or re-grout.I've also used this to strip down a layer of thin set mortar down to the backerboard, for reapplication of tiles. It's not the fastest job, but I haven't figured out a better way of doing it. I just had to use a lot of care because the bit eats into the backerboard faster than the mortar, though the resulting grooved surface doesn't result in any problems, and probably help in adhesion of the re-application.It's also a good bit for cleaning up exterior stucco slop.As for value, I can buy 2 or 3 Harbor freight bits for every Dremel bit, but the HF bits have not only the breakage problem after about an hour of use, but also wear a bit more quickly and don't have the squared-off corners to get into the grout corners (where a wall meets another wall, or where a wall meets a horizontal surface.If it weren't for the corners, I'd probably give this a 4-star rating (due to usefulness for value). For instance, if you're re-grouting an entire flat wall or floor, use there's money to be saved by using HF for most of the work, and this bit for the tight areas."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"W***R"},"datePublished":"September 16, 2023","name":"Did the job on my shower tile rehab","reviewBody":"This was perfect for my Dremel 6300 multi-tool. Another carbide blade which was advertised on Amazon as compatible with Dremel did NOT fit the 6300, so watch out if you are thinking of ordering one of these 3 for 1 blade deals. I used this to rehab the grout in the tiles in my shower and it worked fine. Made an easy job out of the drudgery that would have existed with a hand grout saw. I highly recommend this blade."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"J***E"},"datePublished":"March 30, 2019","name":"Great tool","reviewBody":"Used this on my dremel multi max to regrout my bathroom - and it’s incredible. Removes grout quickly and easily, and it never seems to wear out.One thing - if your tiles are set closer than 1/16” apart, as mine are, it will cut into the tile. For me this wasn’t a problem - I have white tiles and I used white grout, so you can’t really tell the tiles were cut into a little. In fact, I now have even spaces between the tiles throughout the bathroom, so it ended up a positive.I would just say go slowly and let the machine do the work. If you apply too much pressure, you will chip your tiles. Position the machine so that your view of the blade is clear, and keep the blade moving in a straight line along the grout line, and avoid hitting the edge of the tile."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"3.0"},"author":{"@type":"Person","name":"D***C"},"datePublished":"February 10, 2025","name":"Doesn't fit Dewalt","reviewBody":"Does not fit DeWalt oscillator"}],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.571428571428571,"bestRating":5,"ratingCount":7}}
