A high quality 1/2"D impact driver, suitable for 5/16" hex bits, designed to deliver a strong, sudden rotational force and forward thrust when struck with a hammer to release stubborn fasteners. The two-way impact mechanism has a twist/lock clutch adjuster for clockwise and anti-clockwise use. This set includes thirteen bits including, Phillips, Flat and Hex, neatly presented in a blow mould storage case making it easy to find the right bit for the job. This robust impact driver can be used with 1/2" sockets or 5/16" extractor bits. Features and Benefits Set includes: 1/2""D impact driver & 1/2""D bit adaptor & 13 bits 13 x bits, 5/16"" (8mm) shank Phillips Ph1, Ph2, Ph3 Ph4 Flat 4, 6, 8, 10, 12mm Hex 4, 5, 6, 8mm Two-way clutch, can be used in forward or reverse Bits manufactured from chrome vanadium Can also be used with 1/2""D socket accessories