Craftsman’s Universal Tool Sets include a 7-piece universal wrench set, 12-piece universal wrench set 1/4” drive, 9-piece metric universal socket accessory set, 19-piece 1/4” drive socket wrench set, 9-piece 3/8” metric universal socket accessory, 3/8” drive universal ratchet and 56-piece universal mechanic’s tool set. All sets come in SAE and metric measurements unless otherwise stated. These tools include a unique universal tooth design that fits six different types of nuts and bolts, so users can tackle the project for almost any type of fastener they encounter. These tools fit 6-point, 12-point, partially-rounded, external Torx, square and spline shaped fasteners.