Proto J5211M 11mm 3/8 Drive 12-point Chrome Hand Socket

Product Description

The PROTO J5211M is a standard-length, 12-point hand socket designed for 3/8 inch drive ratchets and breaker bars. It fits an 11 mm fastener and features a chrome-plated finish that resists corrosion and makes the socket easy to clean after use. The 12-point design engages hex fasteners at multiple positions, which is useful in tight spaces where swing arc is limited. This socket is built to ASME B107.5 standards and is a staple in the toolboxes of mechanics, HVAC technicians, plumbers, and electricians who work with metric fasteners daily.

The J5211M is suited for general mechanical and trade service work where an 11 mm metric fastener is encountered. Standard length makes it the go-to choice for open-access fasteners on equipment panels, motor mounts, bracket hardware, and similar applications found in residential and light commercial service environments. Its compact dimensions make it easy to carry in a standard socket rail or tool pouch on the job.

Key Features

• 11 mm socket size fits common metric fasteners
• 3/8 inch drive compatible with standard ratchets and extensions
• 12-point design allows engagement at 30-degree increments for use in restricted spaces
• Chrome-plated finish for corrosion resistance and easy cleaning
• Standard length for everyday open-access fastener work
• Meets ASME B107.5 standards for hand socket tools

Compatibility

Designed for use with 3/8 inch drive ratchets, breaker bars, and extensions as an OEM-style replacement or addition to any standard 3/8 inch drive metric socket set.

Installation Notes

Installation is performed by hand tool technicians across all trades. Ensure the socket is fully seated on the fastener before applying torque to avoid rounding. Inspect the socket and drive square for wear or cracking before use, and do not use impact drivers with this hand socket unless the socket is rated for impact service.