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The PROTO J5541M is a 41 mm, 12-point hand socket designed for heavy-duty fastener work using a 3/4 inch drive. Built to standard length dimensions and finished in chrome plating, this socket delivers reliable engagement on large hex fasteners found in industrial, commercial, and fleet maintenance environments. The 12-point configuration allows for 30-degree increments of ratchet positioning, which is useful in tight clearance situations. Licensed tradespeople and experienced mechanics rely on PROTO hand sockets for consistent fit and durability across demanding service conditions.
This socket is suited for applications requiring a 3/4 inch drive tool — including impact wrenches, breaker bars, and ratchets — where large fasteners in the 41 mm range are common. Typical install scenarios include heavy equipment service, structural bolting, large-bore plumbing flange work, and industrial machinery maintenance. The chrome finish resists corrosion and simplifies cleaning after use in greasy or wet environments.
Designed as an OEM-style replacement or direct addition to 3/4 inch drive socket sets used in industrial and heavy-duty mechanical service applications.
This socket is installed by mechanics, millwrights, and heavy equipment technicians. Ensure the drive tool is rated for the torque demand of the fastener before applying load. Inspect the socket for cracks or deformation before each use, and never use a hand socket with a pneumatic or hydraulic impact tool unless it is rated for impact service. Store sockets in a dry location to maintain finish integrity.
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