The Torq-It Speed Driver is a manually powered tool driver that can be held in one hand. With a screwdriver, nut driver, sock-et, or drill bit mounted on the hand piece, a cord is pulled to cause the driver to spin. (One pull of the cord is equal to 15 turns of the wrist with a regular tool.) The Speed Driver, which allows nuts and screws to be tightened or loosened without the repetitive twisting of wrist and arm, comes with a 1/4- to 3/8-inch hex adapter, slotted and Phillips screwdriver bits, and Torx-type bits.