LINK Tools offers two Professional Upgrade Sets featuring its all-metal Locker ratchets with built-in tether hole. These sets are designed to completely eliminate the possibility of a dropped tool or a tool left behind. The ratchet tethers to the tool operator, who can then connect any number of LINK-Locking drive tools and the operator’s existing socket or socket-mounted accessory, to create a perfect custom tool that allows for easiest positioning and utmost safety and security for the job at hand. No matter how many tools are connected together, they function as a single tool securely fastened from the user’s body to the work. The Locker Upgrade Sets consist of seven unique drive tools that all automatically lock together with a simple push-on: ratchet, universal joint, three extensions, Unidriver,and palm wrench/speeder, all compatible with standardized sockets and accessories. For more information call (888) 433-4234, email email@example.com or visit www.linktools.com.