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The WILLIAMS COMFORT PRODUCTS JHW3712 is an offset open end wrench with a 3/8 inch opening and an overall length of 4.75 inches. Both wrench heads are offset — one at 15 degrees and one at 60 degrees to the handle — giving the technician four distinct working positions from a single tool. The thin head profile and 45-degree chamfer on each end allow fast placement onto fasteners in confined spaces. Built to ANSI B107.39 Type 2-Class 3 standards, this wrench is suited to mechanics, HVAC technicians, plumbers, and other trade professionals who work regularly in tight clearances.
The JHW3712 is designed for general fastener work in residential and commercial service applications where standard straight wrenches cannot achieve adequate swing or access. Both ends share the same 3/8 inch size, making the offset angles the differentiator when working around obstructions, along panel edges, or in cramped equipment compartments. The continuous arc head geometry resists spreading under load, which extends tool service life compared to open-offset-over designs.
Designed as a standard open end wrench for 3/8 inch fasteners across residential and commercial trade service applications.
This wrench is a hand tool requiring no installation. Before use, confirm the fastener size matches the 3/8 inch opening to avoid rounding. De-energize or shut off any equipment before loosening or tightening fasteners on live systems. Inspect the wrench for cracks or deformation before each use and replace if the head shows signs of spreading.
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