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"Pick-Up" spark plug wrench with an unusual design, marked with "Pick-Up" and "Patd" on the handle. In operation, the handle can be raised in its loose connection to allow the tab to disengage from the socket, and then turned to engage the next slot.The overall length is 9.4 inches, and the finish is plain steel.The patent notice refers to patent #847,601, filed by G.B. Pickop in 1907 and issued later that year.The patent description calls this as a ratchet wrench, but technically it is a clutch mechanism, as the socket can be turned in either direction once the slot and tab are engaged. The "Pick-Up" trade name is a clever play on the inventor's name and the method of operation, as the handle is picked up to disengage the drive.