Klein Tools 3243 Hex Bar, 36-Inch

The Klein Tools 3243 is a forged fit-up bar for steel and concrete construction. Ironworkers use it to lever steel members into position and to draw bolt holes into alignment before pinning. One end is pointed so it can be driven into a bolt hole and used as a drift, and the opposite chisel end sits at a 15 degree angle so you get more leverage when you pry against a flange or slab edge. Always wear approved eye protection when striking or prying with it.

36 inches (91.4 cm) overall, with a 7/8 inch (2.2 cm) hex body, and it weighs 6 lb (2.7 kg). That is a two-handed bar: the 36 inch length is what gives you the swing and reach for aligning heavy members, and the hex body keeps it from rolling off decking or a beam while you work. If you need something you can carry on a belt or work in tight bays, this is not the size for it.

The bar tapers to a point at one end, so it enters a hole smaller than its 7/8 inch hex body and wedges as you drive it in. That taper is what lets you pull two misaligned plates together. The full 7/8 inch section will not pass through a hole sized for a 3/4 inch bolt, so the bar seats rather than passes through, which is the intent for fit-up work.

Yes. The 3243 fit-up bar is made in the USA, which matters on government, institutional, and publicly funded projects that carry domestic sourcing requirements on jobsite tooling.

Different jobs. A spud wrench pairs a wrench opening with a tapered handle for running and aligning bolts. The Klein 3243 has no wrench end at all: it is a dedicated 36 inch lever, pointed on one end for drifting holes into line and chisel ended at 15 degrees for prying. Reach for it when you need leverage moving steel members or breaking a joint loose, and keep a spud wrench on the belt for actually turning bolts. A flat pry bar is for finish and demo work, not structural fit-up.

Single tool. Ordering the 3243 gets you one 36 inch hex fit-up bar, model number 3243, in one configuration with no length or end options to specify. Crews outfitting multiple ironworkers order by quantity.

The 3243 is a forged bar built for heavy-duty steel and concrete construction, and driving the pointed end into a bolt hole is how fit-up bars are used. Klein's own warning on the tool is to always wear approved eye protection, which applies to any striking or prying with it. Inspect the struck end for mushrooming over time as you would any forged steel bar.