Angle grinders spin an abrasive disc at high speed to cut metal, grind welds, remove rust and paint, and cut tile and masonry with the right disc. The first decision is the disc size, because small grinders are light and easy to control for most household and workshop jobs, while large grinders cut deeper and take on heavy steel and stone.
Power source and motor come next. Cordless grinders are convenient around a car, a fence or a roof, but heavy cutting drains batteries quickly. Corded grinders give steady power for long grinding sessions. Among the 5 products that list item weight, most fall between 1.6 and 5.6 pounds, and 5 pounds is typical. A slim body and a paddle switch are easier to hold safely, and an electronic brake stops the disc quickly after release.
Safety features matter more on this tool than on most others. Look for a guard that adjusts without tools, a soft start that avoids the jolt when you switch on, kickback protection that cuts power if the disc binds, and an anti restart function after a power cut. Variable speed is useful for polishing and for heat sensitive materials.
Before buying, check the disc size, the spindle thread, whether a guard, side handle and wrench are included, and whether a battery comes with cordless models. Use only discs rated for the grinder's speed, keep the guard on, wear eye, face and hearing protection and gloves, and clamp the work rather than holding it.
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