DEWALT Oscillating Fastcut Carbide Grout Removal Blade (DWA4220)

I already had a Porter-Cable Oscillating Saw, but needed a blade that would cut brick. This is a diamond coated blade which I used at my Son’s house to install a Ring Video Doorbell to replace his conventional Doorbell. It did require repeatedly going over the brick to complete the cuts but it worked. The blade worked well. It was a universal fit for Oscillating Saws so it was easy to use on mine.

I had to redo my entire kitchen floor grout. With as much time as I spent on my knees, I would expect a raise, but I digress...I bought this grout saw and the counter part "normal" dewalt multi-tool grout saw. I used my Dewalt cordless 20V XR multi tool (they fit fine). Of note, I started with a dremel brand grout blade that I grabbed at Home Depot, and it lasted about 15 square feet. I got both of the dewalts here for about the same money I spent on the dremel alone.Kitchen was about 400 square feet. I did 80% of it with this blade. After burning the dremel one up, I switched between this and the normal dewalt, but used this more because the shape allowed it to cut a wider swath with each pass. My grout must have been mixed poorly at install because I had sections that cut like butter, and others that cut like a diamond. Overall I was very happy with the performance of this piece. I applied more pressure and went slower on the hard parts and it would eventually get it out.I did split the blade like others have posted about near the end of the job, BUT I was clearly starting to abuse the tool. I was also easily 20 hours into the job at this point and at least 250 square feet of cutting. I started to torque it in the groove cut by the grout to clean the sides of the tile in one pass, and it started a split. I'm sure if I had not been more gumptious with it, I could have done the whole kitchen with it.Now, comparing it to the regular, straight blade, I cant say it cut any better. It obviously cuts wider, which sped things up a bit, but for the most part, they were equal in their performance.Hope this helps!

They are not exactly the cheapest blades. I used them with my Ryobi oscillating tool. I went to re-grout the shower and this definitely helped remove the grout between the tile. I also used a hand tool to finish the job. The fact they are universal and do the job so well, I definitely recommend them.

After trying a rotary Dremel that my dad lent to me and a few handheld grout removal tools, I bought a Dewalt oscillating multitool to quickly tear up the grout in my bathroom floor. I was unable to find a Dewalt grout removal blade at the store so I picked up one made by Rockwell (about $12) to try it out. It worked well; at least, it worked better than the other options I previously mentioned. However, I noticed that after only running through about 6-7 feet of 1/8" (about an inch deep)grout, the grit on the blade had wore off substantially and it didn't seem like it was cutting as well. I did a Google search to see what else was available and picked up this Dewalt grinding blade off amazon for about $23. I used it to tear up more grout in my bathroom and all I can say is that it works a whole heck of a lot better than the Rockwell blade. I didn't realize how hard I was pushing on the tool to get the Rockwell blade to cut through the grout. With the Dewalt blade, I'm still pushing on it but not nearly as hard as I had been and it seems to do a better job of pulverizing the grout into dust. Conversely, the Rockwell seems to break it up into larger chunks while pulverizing the top layer. Appearance wise, the Dewalt blade is substantially larger (probably twice as large) and has a wavy pattern to its edge. Not sure how this works better (perhaps more blade is able to come in contact with the grout), but it definitely does. Dewalt says you can cut through grout 2X faster with this blade, but I bet you I'm going 3-4X faster.The only hang up I have is that you chew through the bit really quickly. This is more a testament to the nature of the bit and the tool rather than the Dewalt bit specifically. After tearing up all thr grout in my bathroom I will probably be tossing both bits simply because they have become so dull. For that I can only give it 4 stars.If you are looking for a good grout removal blade to go with your oscillating multitool, Dewalt or otherwise, you can't go wrong with this one. Its worth the money as it saves a lot of time and requires less energy to use.

I went through 5 of the cheaper Chinese versions. They lasted about one minute and took forever to cut through the grout. I was amazed by how well this works. After a WHOLE shower, the teeth and abrasive end are still intact. My job time was cut down dramatically. This toll slices through grout. Well worth the extra cost.

This worked wonders for removing the grout between tiles so I could remove a layer of wall tyle in prep. for new quartz countertop.

THis thing cuts well and I am surprised how well the grit holds up

I used up five of these Dewalt blades on a corded Dewalt oscillating tool regrouting a little 5' x 8' half bathroom with 1 foot square tiles having 1/4" spacing. I am convinced using an oscillating tool with carbide blades such as this is probably NOT the best method of removing grout. If I ever regrout anything else again, I'll try an angle grinder with a diamond blade. Side note: I previously regrouted a very large full master bathroom with 1/16" spaced tiles and found a triangular bit hand tool far more effective than an oscillating tool with 1/16" diamond blades. However, a hand tool on 1/4" spacing is hopeless. Bottom line: Regrouting anything is a painful, hire it out. Heck retiling the whole thing is less effort than "just" regrouting.