As long as you have the strength and a little common sense, they are very nice though get a bit noisy. They get heavy pretty quick so would second getting a smaller one. The vibration on them can also numb out your hands during long term use. Use a pair of heavy gloves to avoid that.
I used them for landscaping alot and we cut metal and stone on our diamond ceramic / masonry blade.
I have found that the diamond masonry blades are one of the best all around blades. Not cheap but will out last many of the cut off wheels. They also do not wear down as fast keeping your cutting depth at a maximum much longer. They can run through about anything I have ever tried from glass to ceramic to aluminum to steel, to plastics.
I strongly recommend avoiding plastic as it requires cleaning the blade after. Aluminum does require cleaning the blade occasionally as well but not all that frequently. To clean the blade just use a piece of mild steel or rebar. this puts enough wear on the blade to clean off the crap and expose new abrasive allowing it to cut like new.
For aluminum, thin sheet / tin and plastic I suggest a reversed (put blade in backwards) fine tooth finish / plywood blade. Keep in mind with this blade having teeth it may jump / kick back a little. use common sense and you will be fine.
For cutting heavy material I would also suggest making a mister to mist the cutting area. The fastest way to burn out cutting wheels is to over heat it. Cutting using abrasive wheels generates alot of heat. Misters have a secondary advantage of keeping the cutting area cleaned so you can see what you are cutting.
Using a small compressor, a sealed container, some fittings, and a air hose you can make a pressurized mister pretty easily. I also like to use lengths of small diameter copper tube drilled with fine holes to make a long cut. Spring clamps work good to keep it pinned down where you need it. It takes a bit of playing around to get one built and working well, but when you do they are worth it. It may seem like more of a hassle but when you are burning through 1 of the disks vs 10 of the same disks the savings in disks should be worth the little bit of hassle.
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