Proto J1118SPL Box End Wrench 1/4 X 5/16 in 12 Point

Product Description

The PROTO J1118SPL is a double-end box end wrench designed for fastener work in tight spaces where open-end wrenches cannot seat fully on a fastener head. It fits 1/4 inch and 5/16 inch fasteners, with 12-point box ends on both sides for precise engagement on hex and square hardware. Constructed from steel with a polished finish, this wrench is built for repeated use in mechanical, HVAC, plumbing, and electrical trade applications. The non-ratcheting design provides a solid, positive drive. Licensed tradespeople and journeymen keep this size range in their service kits for panel work, equipment mounting, and component fastening.

This wrench is suited for residential and light commercial service work where 1/4 inch and 5/16 inch fastener sizes are common. Typical applications include equipment access panel fasteners, blower assembly hardware, electrical enclosure bolts, and plumbing fixture mounting hardware. The double-end configuration reduces the number of individual tools a technician carries on a service call. The compact size makes it practical for confined equipment compartments found in air handlers, furnaces, and electrical panels.

Key Features

• Double-end box wrench fits 1/4 inch and 5/16 inch fasteners
• 12-point box ends allow engagement at multiple rotational positions in tight spaces
• Steel construction with polished finish for corrosion resistance and durability
• Non-ratcheting solid drive for reliable torque transfer
• Lifetime warranty from PROTO
• Lightweight at 0.1 pounds for easy single-hand use

Compatibility

Designed as a general-purpose double-end box end wrench for use with 1/4 inch and 5/16 inch hex fasteners across HVAC, plumbing, electrical, and mechanical service applications.

Installation Notes

This wrench is a hand tool requiring no installation. Technicians should select the correct end for the fastener size before applying torque to avoid rounding fastener heads. Ensure fasteners are fully seated in the box end before turning. Follow applicable trade codes and equipment manufacturer guidelines when servicing energized or pressurized systems.