Compared to even the best pinned impacts, X-Coreâ„¢ Pinless impact tools deliver far greater durability and superior access. The exclusive four-lug ball-and-socket design of these GEARWRENCH universal-joints, sockets, and extensions provides the long-lasting strength and capability needed to take on the toughest automotive and industrial applications. When durability is key, the choice is clear. GEARWRENCH X-Coreâ„¢ pinless.