Proto J3100B Open End Wrench Set 14 Pc Inch

Product Description

The PROTO J3100B is a 14-piece open end wrench set covering inch sizes from 3/8 inch through 1-1/4 inch. Each wrench features a polished finish that resists corrosion and makes it easy to wipe clean after use. The set ships in a tool roll for organized storage and quick access in a shop, service van, or on a job site. Mechanics, millwrights, pipefitters, and HVAC technicians who work with inch-standard fasteners will find the full size range useful for general assembly, equipment maintenance, and mechanical service work.

This set is suited for industrial, commercial, and residential maintenance applications where inch-standard fasteners are common. The 14 individual wrenches span 3/8 inch, 7/16 inch, 1/2 inch, 9/16 inch, 5/8 inch, 11/16 inch, 3/4 inch, 13/16 inch, 7/8 inch, 15/16 inch, 1 inch, 1-1/16 inch, 1-1/8 inch, and 1-1/4 inch. This coverage makes the set practical for mechanical rooms, boiler service, HVAC equipment, and general trade work requiring a broad range of open end wrenches.

Key Features

• 14-piece set covering 3/8 inch to 1-1/4 inch in inch measurements
• Polished finish for corrosion resistance and easy cleanup
• Stored in a tool roll for organized transport and field use
• Full size listing: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8, and 1-1/4 inch
• Inch measurement system suits US standard fasteners across trade applications

Compatibility

Designed for use with inch-standard fasteners across mechanical, HVAC, plumbing, and general trade service applications.

Installation Notes

Open end wrenches are used by licensed mechanics, HVAC technicians, plumbers, and other trade professionals during equipment installation and maintenance. Always de-energize or shut off the equipment being serviced before applying hand tools to fasteners. Select the correct wrench size for a snug fit to avoid rounding fastener heads. Keep tool roll stored in a dry location to prolong finish life.