The DEWALT 38-Piece IMPACT READY Accessory Set lets you drive screws for virtually any project. This set's 38-piece impact driver bits are strong enough to withstand the heavy-duty forces of an impact driver. It comes with several of the most commonly used sizes of Philips bits, to use as replacements or to equip your entire crew. The impact driver bit set's five black oxide bits are resistant to rust and corrosion. This set includes a magnetic holder for your bits, which allows for fast changes.