Pre-owned Proto professional socket built for heavy-duty fastening and industrial shop applications. Industrial-grade hand tool suitable for automotive and mechanical work. • Proto professional socket • Size: 1-3/16″ SAE, model 5438 • 1/2″ drive with 12 point design • Designed for heavy-duty fastening applications • Industrial-grade USA-made tool • Proto 5438, 1-3/16 SAE socket, 1/2 drive socket, 12 point socket, mechanic