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The KLEIN TOOLS 3239 is an adjustable-head structural wrench designed for ironworkers, construction crews, and field technicians working with heavy structural connections. The wrench accommodates nuts and bolts up to 1.5 inches, making it suitable for a wide range of structural fastener sizes encountered on job sites. At 16 inches in length, it provides the leverage needed for tight structural connections. An industrial black finish is applied to the tool to resist corrosion in outdoor and high-moisture environments. This wrench is built for trade use where durability and reliable grip on oversized hardware matter most.
The 3239 is intended for structural steel assembly, bridge and building construction, tower erection, and similar ironwork applications. It is a go-to hand tool for ironworkers and structural tradespeople who regularly work with large-diameter fasteners. The adjustable head design allows a single tool to cover a range of nut and bolt sizes up to 1.5 inches, reducing the need to carry multiple fixed-size wrenches on the job.
Designed as a general-purpose structural wrench compatible with standard nuts and bolts up to 1.5 inches, suitable for use in structural steel and ironwork applications.
This wrench is intended for use by ironworkers and construction tradespeople. Inspect the adjustable mechanism before each use to confirm it moves freely and locks securely onto the fastener. Follow applicable OSHA and site safety requirements when working at height or on structural connections. Do not use the wrench as a striking tool or extend the handle with a pipe to gain additional leverage beyond the tool design.
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