Proto JSBV1214 Box End Wrench 3/8 X 7/16 in 12 Point Double End

Product Description

The PROTO JSBV1214 is a double-end box wrench built for professional use in HVAC, plumbing, electrical, and general mechanical service work. It fits 3/8-inch and 7/16-inch fasteners, giving technicians two sizes in a single tool. The 12-point box design provides six engagement positions per turn, which is useful in tight or obstructed spaces where swing arc is limited. The tool is forged from steel with a chrome finish that resists corrosion and simplifies cleanup in the field. At 0.12 pounds, it carries easily in a tool pouch or service bag without adding bulk.

This wrench suits residential and light commercial service applications where standard fractional fastener sizes are common. It is well suited for equipment access panels, electrical enclosures, refrigerant line fittings, and mechanical connections that use 3/8-inch or 7/16-inch hex fasteners. The double-end configuration reduces the number of individual wrenches a technician needs to carry on a service call, making it practical for mobile service work.

Key Features

• Double-end design covers both 3/8-inch and 7/16-inch fastener sizes
• 12-point box opening allows engagement in restricted swing conditions
• Reversing capability supports use in confined spaces
• Chrome-finished steel construction for durability and easy cleaning
• Lightweight at 0.12 pounds for comfortable carry in a tool pouch
• Backed by a lifetime warranty from the manufacturer

Compatibility

Designed as a standard fractional box end wrench for use with 3/8-inch and 7/16-inch hex-head fasteners commonly found in HVAC, plumbing, electrical, and mechanical service applications.

Installation Notes

Installed and used by licensed HVAC technicians, plumbers, electricians, and mechanical service professionals. Always de-energize electrical equipment and shut off fluid or gas supply before accessing fasteners in live systems. Use the correct size end to avoid rounding fastener heads, and confirm fastener drive type before applying torque. Keep the tool clean and inspect for wear or chrome damage that could affect grip on the fastener.