It is still the case that corded tools run at peak performance for as long as they’re connected to power, whereas cordless impact drivers lose power as the battery drains. Their batteries didn’t perform well either only a corded impact driver provided the all-day productivity contractors require. When cordless models first came onto the market, they couldn’t compete with the outright power of corded models. Widely available until relatively recently, corded impact drivers have become something of a rarity. When shopping for the best impact driver, consider the following. These heavier-duty tools make a good choice for remodelers and professional contractors. Less powerful models can handle light-duty DIY projects, while more high-performance drivers will tackle the kind of fixing used for decking and substantial framing constructions. Torque is probably the single most important aspect of an impact driver. What to Consider When Choosing the Best Impact Driver Some impact drivers use a ⅜-inch fitting, but a ¼-inch fitting is much more common. Instead, they have a quick-release hexagonal chuck that accepts bits with a hexagonal shank. Unlike drills, impact drivers do not have a three-jaw self-centering chuck. DIYers may use them for long decking screws, lag bolts, and similar fixings. But, unlike the smooth rotation of a drill, an impact driver uses rotational hammering, which is more effective at driving fixings with screw threads. As a drill, it uses rotational force to drive screws into wood, for example.
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