Heavy-duty shaft couplings have traditionally had a couple of defining design characteristics. For one, these couplings usually rely on keyed shaft connections. For another, they tend to be ...

Brushed motors require small metal brushes to work with the magnets to keep the shaft ... getting a drill that will last longer. For now, brushless drills mainly come in the heavy-duty and general ...

making them a popular choice for heavy-duty jobs like framing walls or building decks. If you’re looking to buy a new drill or an impact driver, they cost anywhere from $30 to $400. Read on for ...