Impact driver 3/8"D with 1/4" and 5/16" hex bit holders for loosening over-tightened, rusted or seized fasteners. The driver has a knurled shaft for grip and has a durable black finish, it delivers a strong, sudden rotational force and forward thrust when struck with a hammer to release stubborn fasteners with ease. A quality set that includes a selection of Phillips and Flat bits, presented in a blow mold storage case.