Proto JSBV2428 Double End Box Wrench 3/4 X 7/8 in 12 Pt

Product Description

The PROTO JSBV2428 is a double-end box wrench designed for professional trade use in mechanical, HVAC, plumbing, and electrical service work. It features two box ends sized at 3/4 inches and 7/8 inches, each with a 12-point profile that engages fastener flats cleanly and reduces the risk of rounding. The wrench is constructed from steel with a chrome finish that resists corrosion and simplifies cleaning after use. The reversing capability allows the technician to reposition without removing the wrench from the fastener, which is a practical advantage in tight or confined spaces. This is a hand tool intended for licensed tradespeople and experienced service technicians.

The JSBV2428 suits residential and light commercial maintenance tasks where 3/4-inch and 7/8-inch fasteners are common. Typical applications include equipment mounting hardware, flange bolts, valve packing nuts, and mechanical system connections encountered in HVAC installations, refrigeration service, plumbing rough-in, and general mechanical work. The dual-size configuration reduces the number of tools a technician needs to carry for mixed-fastener jobs.

Key Features

• Double-end design with 3/4 inches and 7/8 inches box openings on a single wrench
• 12-point profile for multiple engagement positions on hex and 12-point fasteners
• Reversing function allows repositioning without lifting the wrench off the fastener
• Steel construction with chrome finish for durability and corrosion resistance
• Backed by a lifetime warranty from PROTO

Compatibility

Designed as a standard double-end box wrench suitable for 3/4-inch and 7/8-inch fasteners commonly found in HVAC, plumbing, and mechanical service applications.

Installation Notes

This wrench is a hand tool used by HVAC technicians, plumbers, pipefitters, and general mechanical tradespeople. Always ensure the correct size opening is fully seated on the fastener before applying torque to prevent fastener damage or slippage. Use in combination with appropriate personal protective equipment when working near energized equipment or pressurized systems. Inspect the wrench for cracks or wear before each use and replace if the box opening shows signs of deformation.