JEGS socket bit adapter set makes easy work of removing or installing bolts in tight places where a large ratchet head and socket or bit adapter will not fit. Easily adapts your socket or bit adapter to an open or box end wrench. The set of four includes: one 1/4'' drive adapter for a 3/8'' wrench, one 3/8'' drive adapter for a 1/2'' wrench, 1/2'' drive adapter for a 3/8'' wrench and a bit adapter for a 3/8'' wrench.