The Stanley Proto 5420B is a high-quality 1/2" drive, 5/8" 12-point black socket designed for demanding industrial applications. Part Number: 5420B. The Stanley Proto 5420B socket can also be referred to as a 1/2" drive 5/8" 12-point socket, black oxide finish socket, industrial-grade socket, high-torque socket, and precision-machined socket.
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