8pc IMPERIAL Hex Key Socket Bit Set1/4" and 3/8" Sq Dr Damaged and Stripped BoltsProfessional heat treated Chrome Vanadium steel sockets. Steel hex bits with a zinc phosphate finish. Removes rusted, damaged and severely rounded hex head fasteners with ease. Patented twist design grips tighter as they turn. Prevents fasteners from rounding. Supplied on a metal socket railFeatures: Professional heat treated Chrome Vanadium steel sockets. Steel hex bits with a zinc phosphate finish. Removes rusted, damaged and severely rounded hex head fasteners with ease. Patented twist design grips tighter as they turn. Prevents fasteners from rounding. Sizes: 1/4"Sq Drive; 1/8"-3/16", 3/8"Sq Drive; 7/32"-3/8". Supplied on a metal socket rail. Lifetime guarantee*. Specification: Contents -1/4"Sq Drive; 1/8", 9/64", 5/32", 3/16", 3/8"Sq Drive; 7/32", 1/4", 5/16", 3/8" Drive -1/4" and 3/8"Sq Maximum Length -48mm Minimum Length -38mm Further Information We sell a wide variety of tools and workshop equipment for both the DIY and Professional markets. Alias: ys01557