The ETBB29 is a hook tungsten bucking bar for reaching around structure to back rivets a flat bar cannot reach behind. At 1.65 lb and 4 x 1.5 x 0.75 inches, it brings the backing mass of a much larger steel bar to the rivet, so shop heads form clean with less shock to your hand.
A footed hook profile reaches past a rib, flange, or edge and seats tungsten mass on the rivet tail. At roughly 2.5 times the density of steel it delivers heavy backing from a slim tool, so shop heads form clean with less recoil.
- Dimensions: 4 x 1.5 x 0.75 in
- Weight: 1.65 lb (medium)
- Shape: Hook
- Best-fit access: ribs, flanges, and boxed structure
Request a quote for current pricing and lead time.
Compare every bar on the size and weight chart, match a competitor part on the cross-reference, or get a recommendation from the Selector.
Questions about this bar
What is the ETBB29 tungsten bucking bar used for?
The ETBB29 is a hook tungsten bucking bar for reaching around edges and flanges to back a rivet a straight bar cannot, hooking the mass in behind the joint. Hold it flat and square against the rivet tail so the shop head forms evenly.
How much does the ETBB29 bucking bar weigh and what size is it?
The ETBB29 weighs 1.65 lb and measures 4 by 1.5 by 0.75 inches. You buy a bucking bar by weight, and tungsten packs that weight into a far smaller block than steel.
Why is the ETBB29 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB29 delivers the same bucking mass as a steel bar more than twice its size. The compact mass means better access in tight structure and less shock to your hand.
