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The PROTO J5239-55W is a T55 hand Torx bit socket designed for 3/8 inch drive ratchets and extensions. It features a ball end design that allows engagement with Torx fasteners at off-axis angles, useful in tight or obstructed work areas. The overall length is 1-31/32 inches. This socket is suited for professional technicians who need reliable Torx fastener drive capability in automotive, HVAC equipment, and general mechanical service applications.
This socket is used in service environments where T55 Torx fasteners appear on machinery, equipment panels, and assemblies. The 3/8 inch drive sizing makes it compatible with standard mid-range drive ratchets and torque wrenches commonly found in trade and shop tool sets. The ball end feature adds flexibility for angled access in confined spaces where a straight approach is not possible.
Designed as a direct-fit hand socket for use with 3/8 inch drive ratchets, extensions, and torque wrenches accepting standard square drive tooling.
This socket is installed and removed by hand tool technicians in automotive, mechanical, and equipment service settings. Ensure the drive square is fully seated in the ratchet or extension before applying torque. Inspect the Torx bit profile for wear before use to avoid fastener damage. Follow the equipment manufacturer torque specifications when tightening T55 Torx fasteners.
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