CTK148 is part of Apex Tool Group's Master Mechanic brand. It is a 148-piece tool set containing a variety of wrenches, pliers, ratchets, screwdrivers, and other commonly used mechanics tools. The tool set comes in a durable metal case with metal and soft foam linings to help keep the tools organized. It also includes a 16-inch adjustable wrench, 8-inch groove joint pliers, 8-inch lineman pliers, 8-inch adjustable slide-jaw locking pliers, a ratcheting bit driver, and 6 double-end screwdrivers.