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The PROTO J47055LM is a deep hand socket designed for professional hand-tool use in mechanical, maintenance, and industrial service environments. Built to a 5 mm socket size with a 1/4 inch drive, it features a 6-point internal geometry that maximizes contact with fastener flats and reduces the risk of rounding under torque. The chrome-plated finish provides corrosion resistance and makes the socket easier to clean after service. Licensed tradespeople and industrial mechanics reach for deep sockets when standard-depth sockets cannot clear extended fastener threads or stud protrusions.
This socket is suited for automotive, HVAC equipment, electrical panel work, and general mechanical maintenance wherever 5 mm fasteners are present on assemblies requiring additional socket depth. The 1/4 inch drive pairs with compact ratchets, extension bars, and torque wrenches commonly used in tight-access service situations. It is packaged individually and is appropriate for both shop tool sets and field service kits.
Designed for use with standard 1/4 inch drive ratchets, breaker bars, and torque wrenches. Fits 5 mm metric hex fasteners in deep-reach applications.
This socket is installed and removed by hand-tool mechanics and maintenance technicians. Always ensure the drive connection is fully seated before applying torque to avoid socket slip or drive damage. Inspect the socket for cracks or wear before each use, and replace any socket showing deformation. Do not use hand sockets with impact drivers unless the socket is rated for impact use.
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