The ETBB45 is a hook tungsten bucking bar with a knurled saddle for backing rivets along a bead or flange and around a hooked edge. At 2.15 lb and 4.8 x 1.5 x 1 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 knurled channel along the bar grips the work while the hooked end reaches around a flange to seat tungsten mass on the rivet tail. At roughly 2.5 times the density of steel it backs the rivet cleanly with less recoil.
- Dimensions: 4.8 x 1.5 x 1 in
- Weight: 2.15 lb (medium)
- Shape: Hook
- Best-fit access: beads, flanges, and curved features
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Questions about this bar
What is the ETBB45 tungsten bucking bar used for?
The ETBB45 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 ETBB45 bucking bar weigh and what size is it?
The ETBB45 weighs 2.15 lb and measures 4.8 by 1.5 by 1 inches. You buy a bucking bar by weight, and tungsten packs that weight into a far smaller block than steel.
Why is the ETBB45 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB45 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.
