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The PROTO J5423MN is a 23 mm, 12-point hand socket designed for professional-grade fastener work with a 1/2 inch drive. Built from chrome-plated steel, it measures 1.81 inches in overall length, placing it in the standard-length category. The 12-point geometry engages hex fasteners at multiple entry angles, which reduces ratchet arc requirements in tight spaces. This socket meets AS4984A, ASME B107.110-2012, and SAE AS955 standards, making it a compliant choice for demanding trade and industrial environments. Mechanics, millwrights, and maintenance technicians working on mechanical assemblies, HVAC equipment, and industrial machinery will find this socket a direct-fit, code-conforming hand tool.
This socket is suited for residential and commercial maintenance, automotive service, and light industrial applications where a 23 mm fastener size is common. The 1/2 inch drive pairs with standard breaker bars, torque wrenches, and ratchets found in most professional toolboxes. Its standard length profile makes it appropriate for general-access fasteners where a deep socket is not required. The chrome finish resists corrosion in typical shop and field conditions.
Designed as an OEM-style replacement or upgrade hand socket for use with any standard 1/2 inch drive ratchet, breaker bar, or torque wrench requiring a 23 mm socket size.
This socket is installed and used by mechanics, maintenance technicians, and trade professionals working on mechanical assemblies. Ensure the drive tang is fully seated in the ratchet or torque wrench square drive before applying force. Do not use impact drivers or pneumatic impact wrenches with this hand socket, as it is not rated for impact use. Inspect the socket for cracks or wear before each use and replace if any deformation is observed.
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