I use a portable grinder quite a bit for work, cutting down rebar and sheet metal. A grinder is a pretty simple tool, all it does is spin a cutting or grinding wheel, so it is difficult to see how it could be greatly improved upon. This tool greatly improves old grinder technology.Firstly, the power of this tool is excellent. As powerful or perhaps even more powerful than many corded grinders. The downside of that is of course that it chews through batteries at a pretty fast clip. A fully charged 2ah Dewalt battery will last a few minutes, and a 4ah will last about 8-10. I don't have any flexvolt batteries so I was unable to test out how they perform, but even without a flexvolt the power is more than adequate.But what really sets this tool apart from all the other grinders I have used is the safety shutoff feature. Fraying, cracking and shattering abrasive blades happens in an instant with a normal grinder when the blade gets bound up (which happens very easily on long straight cuts, cutting anything with tension from weight such as rebar). This tool instantly cuts power to the blade and it stops - faster than I can see it happen. This does two things - one, it saves stuff from flying off and hitting and possibly injuring you. That alone is worth the purchase. The second is that it SAVES the blade. When you cut with this tool, the blades last much longer because they don't fray, crack and shatter on a regular basis. Even though abrasive blades are relatively cheap, I can tell already this tool will pay for itself in the reduction or elimination of blades damaged by the tool.Could not be happier with this grinder!

This is my first angle grinder, so I am not writing with a lot of experience. Others have described the product well, so I will focus on the things I was uncertain of or confused about when buying it or starting to use it. Experienced users will probably not find this very helpful. I was planning to buy the DCG413, but this grinder (DCG416) was less expensive, even while seeming to be a higher spec product. It is, and I’m still not sure why this is less expensive, but I am happy to have it. Still, here are the questions I had, and the answers.First, will that Flex Advantage really make a difference if I use a Flexvolt battery. Yes, I have one 6 Ah Flexvolt battery and two 5 Ah standard 20v batteries and I have been using this with a cement grinding wheel to prepare a basement floor for tiling. (Tip: use the Dewalt dust shroud if you are doing that… really!) Anyway, not only is the tool noticeably more powerful with the Flexvolt, that 6 Ah battery lasts longer than both of the 20v 5 Ah batteries combined. Further, the Flexvolt battery is only mildly warm when run out, and charges immediately after use, while the 20v 5 Ah batteries are quite hot to the touch and the charger delays charging them while they cool down. I don’t know for sure, but my guess is that the 413 would have been a lot like this with the regular batteries.How long do the batteries last? Not long. Although the Flexvolt does much better than the regular 20v, I still probably only get about 200 sqft (about an hour or so) out of all three combined. For such continuous use, you could potentially find yourself frustrated by frequent charges unless you have 6-8 batteries that you could rotate (or 4 Flexvolt). I don’t mind because this is DIY work for me and I am happy to take the break and give my back a rest.What’s this 4 1/2” to 5” thing… which is it? Apparently, they have decided that this is powerful enough to run 5” discs and it comes with a 5” Type 27 guard, so you can run either 4 1/2” or 5” discs as you choose. Since there are many, many more 4 1/2” options, that’s what I’ve been running. Anyway, it’s all good. You have more options than with the DCG413.What’s all this about 5/8” or 7/8” arbor size. Which one is this? It took me a while, but I finally found the answer, which is both. The actual arbor is 5/8” so you can use those discs, but the backing flange includes an adaptor for a 7/8” wheel. Don’t stress about it, you can use either.A few other impressions… it takes a while to get used to using this tool. Don’t expect to be an expert from the start. It’s a powerful, and potentially dangerous tool. Be sure to watch some videos on how to use it safely. It really is important that you understand the physics of a spinning wheel, what part of the wheel to use, etc. The paddle switch is a bit awkward, but I’ll get used to it. The other option is a thumb switch on some other models, but I wouldn’t want that on a battery operated tool. I have to move around a lot, and I believe I am extending my battery life by not having it running while I move. If I had a corded model, I might prefer the thumb switch.This would be old news to experienced users, but I am in awe of the power of this thing. The closest thing I’ve come to what I am doing with this currently is an orbital sander (in the sense that I am scuffing up the cement floor so it will bind well with the thinset, like I do with a sander on wood before painting) and that sander is hugely forgiving next to this. If I set it down at an angle, it will gouge the floor. If I’m sloppy in lifting it up, it will gouge the floor. I always thought of cement as hard, but this tool really goes through it.Now I’m thinking of all the other things I can do with this that I could never do before. While I bought this for this one task, I am already seeing a lot of other uses for more traditional angle grinder tasks. This is a good choice for a DIY homeowner.

Excelente producto

Great grinder

This was my sons Christmas present. Hes extremely selective with his tool choices and he chose this one so must be good.

Works good for thin metal like roof panels. Also goes thru thicker metal but have extra 5AH batteries on hand.. I went thru a fully charged battery in less than 8 mins of run time on metal on top of shingle. To its credit, it went thru it pretty good but was not the tool for that big job. Used a friend's corded tool but had to run 3 extension chords to do it.. for the rest of the roofing job, it worked pretty good and that's what made me keep it. I've also used it to notch out tposts and tidy up some things on my trailer so it's a good small job tool. The on off lever is tricky to get used to with the safety tab that has to be moved before you can turn it on but that isn't a deal breaker. I do like the adjustable shroud that rotates and even comes off if you need it to be out of the way.

Have one at work got one for home works well

Working just fine

Been using the grinder for about a month now. Only for work maybe 5 to 10 minutes a time. But I find no issues with the unit.

Ha funcionado muy bien hasta el momento. Lo importante es complementar con una batería de buen rendimiento.

This tool is amazing ! Really strong and durable !!! I recommend it all the way. Try it and you will see by yourself .

Only used it briefly but for the short time this thing seems to hold up and do quite well for a battery powered item. I will do an update if anything changes

Llego en tiempo y forma. La calidad de lo mejor