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DeWalt 18V XR angle grinders run on brushless motor technology which means longer runtime and less wear over time. That matters on a busy site where downtime costs money.
Most models in this range take 115mm or 125mm discs. The smaller 115mm suits tight spaces and lighter cutting work. Go for 125mm when you need faster material removal on steel or concrete.
The XR platform is compatible with all DeWalt 18V batteries so if you already own XR tools you can run these straight out of the box. A 5Ah battery will give you significantly more runtime than a 2Ah - worth knowing before you buy.
Look for models with a kickback brake. It stops the disc in milliseconds if the grinder snags. Some variants also include a soft-start feature which reduces startup torque and is easier on the disc and your wrist.
For heavy-duty grinding and cutting tasks the XR range holds up well against corded alternatives. The cordless angle grinder format gives you freedom to work anywhere without trailing cables across a site.