The ETBB25 is an offset-profile tungsten bucking bar that reaches past an obstruction while keeping full contact behind the rivet. It measures 3 inches long by 1.75 inches wide by 1.438 inches thick and weighs 3.15 lbs. The extra mass makes it well suited to larger rivets and jobs that need a firm, stable backing.

Because tungsten is far denser than steel, it delivers the rebound mass of a steel bar well beyond its size. In a cramped bay that means less bar to hold and position, a steadier rebound behind the rivet set, and less hand and wrist fatigue over a long session.

It is machined in the USA from high density tungsten alloy and dressed so the working faces stay smooth against aluminum. It is a dependable pick for aircraft assembly and repair, restoration and experimental builds, and any solid rivet work where control and access matter.

To be sure this is the right bar for your rivet pattern, USA Tungsten publishes the complete spec sheet for this size, and how to choose the right bucking bar can help you compare it against other sizes and shapes.

Frequently asked questions

What jobs is the ETBB25 bucking bar best for?

It is an offset bar at 3.15 lbs and 3 by 1.75 by 1.438 inches. The extra mass makes it well suited to larger rivets and jobs that need a firm, stable backing.

How is a tungsten bucking bar better than steel?

Because tungsten is far denser than steel, it delivers the rebound mass of a steel bar well beyond its size. You get the backing mass you need without a heavy, bulky steel bar to wrestle.

Is the ETBB25 made in the USA?

Yes. It is machined in the United States from high density tungsten alloy and finished so the working faces will not scuff aluminum skin.