This wobble extension set is designed to wobble when in contact with the socket providing enough flex to get a firm grip. Made of premium chrome vanadium steel, they have the strength to loosen stubborn fasteners without twisting or bending. Each socket features high visibility markings for quick socket selection. Spring-loaded detent balls securely latch onto sockets, preventing them from being dropped or left sticking on fasteners. The wobble extension set is ideal for auto shops, garages and for any project with hard-to-reach nuts and bolts!