A high quality impact socket set in 1/2" square drive, Bi-Hex (12pt) profile. This ten piece box set covers a good range of commonly used sizes from 13mm to 24mm. Manufactured from chrome molybdenum designed to withstand the stresses of impact tool use. Presented in a quality fitted storage case that features a twin metal-pinned hinge and solid clip closure to keep the set secure in transit. The practical black phosphate finish offers improved corrosion resistance for years of professional use.