Proto J3440 Extra Thin Open End Wrench 13/16 X 7/8 in

Product Description

The PROTO J3440 is an extra thin open end wrench with a double-ended head design, built for trade professionals who need access in tight or restricted spaces where standard wrenches cannot fit. Constructed from steel with a satin finish, this wrench features a 15-degree head angle that improves clearance and usability in confined work areas. The head width measures 1-49/64 inches. At 0.36 pounds, it is lightweight without sacrificing durability. Plumbers, pipefitters, HVAC technicians, and electricians keep this type of wrench on hand for fastener work where tool clearance is a constant challenge.

The J3440 is suited for residential and commercial maintenance, mechanical assembly, and service applications where thin-profile hand tools are required. The 13/16 x 7/8 inch jaw sizing covers common fastener dimensions found in plumbing, HVAC equipment, and general mechanical work. Its double-ended configuration allows two fastener sizes to be served by a single tool, reducing the number of tools needed on a job.

Key Features

• Extra thin profile allows access in restricted and confined spaces
• Double-ended head provides two jaw sizes: 13/16 inch and 7/8 inch
• 15-degree head angle improves clearance and swing arc in tight quarters
• Steel construction for durability under trade-use conditions
• Satin finish reduces glare and resists surface corrosion
• Lifetime warranty backed by the manufacturer

Compatibility

Designed as an OEM-style open end wrench for general trade use where 13/16 inch and 7/8 inch fastener sizes are required.

Installation Notes

This wrench is a hand tool used by licensed tradespeople across HVAC, plumbing, electrical, and mechanical service work. No power source is required, but standard safe-work practices apply: ensure the work area is de-energized or de-pressurized before loosening fasteners on live systems. Select the correct jaw size before applying torque to avoid rounding fastener heads. Inspect the tool before each use and do not use a wrench that shows cracks or deformation.