Proto J1210ES Combination Wrench 5/16 Inch 12-point

Product Description

The PROTO J1210ES is a 5/16-inch combination wrench designed for fastener work in tight spaces where a standard straight-head wrench cannot reach. The offset head design provides clearance over obstructions, allowing the tech to maintain torque without repositioning repeatedly. Built from steel with a chrome finish, this wrench measures 3.5 inches overall length and weighs 0.05 pounds, making it a compact addition to any service pouch. The 12-point box end engages hex fasteners at 30-degree increments, reducing the swing arc needed in confined areas. Licensed HVAC technicians, plumbers, electricians, and mechanical contractors reach for this wrench when servicing equipment panels, valve packing nuts, and bracket hardware.

This wrench fits residential and light commercial service applications where 5/16-inch fasteners are common. Typical use cases include tightening or loosening hex-head screws and nuts on equipment enclosures, junction boxes, piping brackets, and control panel mounting hardware. Its short overall length makes it well suited for confined equipment rooms, crawl spaces, and behind-panel access points where a full-size wrench cannot swing freely.

Key Features

• Offset head design improves clearance over obstructions in confined fastener locations
• 12-point box end engages at 30-degree increments for reduced swing arc
• Steel construction with chrome finish resists corrosion and cleans easily in the field
• Compact 3.5-inch overall length fits in tight access areas
• Non-ratcheting design eliminates internal mechanism wear over time

Compatibility

Designed for use with standard 5/16-inch hex fasteners found across residential and light commercial HVAC, plumbing, electrical, and mechanical equipment.

Installation Notes

This wrench is a hand tool and requires no installation. Always de-energize electrical equipment and shut off gas or water supply before using hand tools on live systems. Follow applicable codes, including NEC for electrical work and IFGC or IPC for gas and plumbing service. Do not use extensions or pipe cheaters on short-body combination wrenches, as this can damage the tool or fastener.