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Ensure safe and reliable use of fastening tools when working at height with these SAE 3/8 in tethered combination wrenches from Proto. With a durable alloy steel construction and satin finish, these wrenches offer exceptional strength and durability for all your professional projects. The spline box end enables a strong grip on 4-pt., 6-pt., 12-pt., or spline fasteners, while the open end design provides top and side access for efficient use. Ideal for mechanics, maintenance crews, and assembly line workers, these tethered wrenches come with a 1/4 in tether attachment point to keep them secure when working at heights, preventing injuries or damage from drops. Upgrade your fastening tools today with Proto's Tethered Combination Wrench SAE 3/8 in and stay safe while on the job!