Get this GreatNeck impact driver bit set ideal for loosening screws and nuts that are rusted or hardened. This 5-piece impact bit set includes a 3/8 inches impact driver, two slotted bits of 5/16 and 3/8 inches, two Phillips bits of numbers 2 and 3. The reversible impact driver tool firmly tightens fasteners with a knurled grip for positive turning. The bits in this 1 impact driver set are manufactured with chrome vanadium steel for strength and durability. UL listed, the impact screwdriver set comes with a case that stores the hand tools safe and organized. Easy to use, this craftsman impact driver set is sure to be of great aid to you.