Compact Case for easy transport and storage Locking mechanism retains sockets to make your work safer and more productive Patented gripping designed to out perform conventional drive configuration Reduces the chance of rounding fastener corners and extends fastener life enables to turn worn or rounded fasteners All Stanley 9 Pieces 1/2 inch Drive Torx Bit Socket Set,are manufactured by using quality assured material and advanced techniques, which make them up to the standard in this highly challenging field