Proto J1028A Box End Wrench 7/8 X 15/16 in 12 Point

Product Description

The PROTO J1028A is a double-end box wrench sized at 7/8 inches and 15/16 inches, built from steel with a polished finish. Each end features a 12-point opening, which allows engagement with fastener heads at 30-degree increments — useful in tight quarters where swing arc is limited. The wrench measures 13.59 inches in length and weighs 0.918 pounds. It meets ASME B107.10 standards and carries a lifetime warranty. Plumbers, pipefitters, HVAC technicians, and electricians reach for this style of wrench when working on flare nuts, union connections, or hex-head fasteners where an open-end wrench would round the corners.

This wrench suits residential and light commercial service work across mechanical trades. Common applications include tightening and loosening flare fittings on refrigerant lines, service valves, union connections on gas piping, and structural fasteners in equipment installations. The 7/8-inch and 15/16-inch sizes are frequently encountered on refrigeration service valves, gas valve fittings, and pipe unions. The closed-box design fully surrounds the fastener, reducing the chance of slippage compared to open-end alternatives.

Key Features

• Double-end design provides two sizes in one tool: 7/8 inches and 15/16 inches
• 12-point box openings allow a 30-degree swing arc for use in confined spaces
• Steel construction with polished finish for corrosion resistance and durability
• Meets ASME B107.10 wrench standards
• Covered by a lifetime warranty
• Closed-box ends fully encircle fastener heads to reduce rounding

Compatibility

Designed as a general-purpose box end wrench for trade and industrial use wherever 7/8-inch or 15/16-inch fasteners are encountered, including HVAC, plumbing, and mechanical installation and service work.

Installation Notes

This wrench is used by hand and requires no power source or special tooling setup. Before servicing any pressurized system, shut off gas supply, electrical power, or refrigerant circuit as required by the application and applicable codes. Use the correctly sized end to avoid rounding fastener heads. Inspect the wrench for cracks or deformation before each use, and do not extend the handle with a cheater bar.