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The PROTO J3216 is a double-ended ignition open end wrench designed for accessing fasteners in tight, confined spaces where standard open end wrenches cannot reach. It features two open end heads sized at 1/4 inch and 7/32 inch, making it a compact, versatile hand tool for mechanical and electrical service work. The wrench is forged from steel with a satin finish that reduces glare and resists surface wear. Dual head angles of 15 degrees and 60 degrees allow the technician to approach fasteners from multiple positions without repositioning the entire arm. This tool is suited for HVAC technicians, electricians, and mechanics who regularly work around ignition systems and tight panel assemblies.
The J3216 is commonly used in residential and light commercial service work where access to ignition system fasteners, control panel hardware, and similarly sized hex fasteners is required. The 1/4 inch and 7/32 inch opening sizes cover common ignition and instrument-panel fastener sizes encountered in HVAC equipment, automotive-adjacent electrical panels, and other compact mechanical assemblies. The slim double-ended profile fits into spaces that a standard combination wrench cannot navigate. Meets GGG-W-636E federal specification standards.
Designed as a general-purpose ignition open end wrench suitable for use on 1/4 inch and 7/32 inch fasteners in HVAC, electrical, and mechanical service applications where confined-space access is required.
This wrench is a hand tool requiring no installation. When using it in service applications, de-energize all electrical circuits and shut off power at the disconnect before working on ignition systems or control panels. Select the appropriate head angle based on fastener access angle to reduce the risk of fastener rounding. HVAC technicians and electricians should follow applicable NEC and equipment manufacturer service procedures when accessing ignition and control components.
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