Proto J1012A Box End Wrench 3/8 X 7/16 Inch 12 Point

Product Description

The PROTO J1012A is a double-end box end wrench sized at 3/8 inch and 7/16 inch, built for professional fastener work in trade and industrial settings. Machined from steel with a polished finish, this wrench features a 12-point box pattern on both ends for positive engagement on hex fasteners. The 12-point design allows repositioning in tighter swing arcs, which is useful in confined spaces. At 7.75 inches in length and 0.19 pounds, it is a lightweight, durable hand tool suited for licensed trades and maintenance technicians who need a reliable wrench for everyday fastener tasks.

This wrench is appropriate for HVAC installation, plumbing rough-in, electrical panel work, and general mechanical maintenance where 3/8-inch or 7/16-inch fasteners are common. It performs well in engine bays, equipment rooms, and tight structural assemblies where a ratchet or open-end wrench may not fit or provide sufficient torque feedback. The double-end configuration reduces the number of tools a technician needs to carry for adjacent fastener sizes.

Key Features

• Double-end design covers both 3/8-inch and 7/16-inch fastener sizes in one tool
• 12-point box profile engages fasteners from multiple positions, useful in restricted swing areas
• Steel construction with polished finish for corrosion resistance and easy cleaning
• Non-ratcheting box end provides maximum torque transfer and durability
• Meets ASME B107.10 standards for hand tool dimensional and performance requirements
• Backed by a lifetime warranty from the manufacturer

Compatibility

Designed as a standard double-end box wrench for use with 3/8-inch and 7/16-inch hex fasteners across residential and commercial trade applications.

Installation Notes

This wrench is a hand tool requiring no installation. Technicians should confirm fastener size before applying torque to avoid rounding fastener heads. Always use the correct end for the fastener being turned. For torque-critical applications, pair with a calibrated torque wrench rather than relying on hand feel alone.