Impact wrenches are necessary if you're lightening or loosening lots of nuts and bolts. If an electric unit is more your speed, here's how the brands stack up.

The black and yellow brand's most powerful impact wrench is this 20V Max ½" cordless ... tool would require either an adapter or impact sockets designed for that specific size.

For aspiring mechanics or weekend warriors overwhelmed by the prospect of building a toolbox on a budget, this Kendo 42-piece socket wrench kit is 51% off right now, bringing your total to just $20.