The ETBB37 is a hook (L or shoe) tungsten bucking bar that reaches around edges and into channels a block bar cannot enter. At 5.75 lb and 5 by 1.5 by 1.5 inches it packs the bucking mass of a much larger steel bar into a compact block, so shop heads form clean with less shock to your hand.
The hooked profile catches behind flanges, lips, and channel walls to back rivets that a straight block bar cannot reach at all. Tungsten density keeps the working mass high even in this slim, reaching shape, so you still get clean shop heads in genuinely difficult access. The extra mass suits larger rivets and thicker, fatigue-critical structure.
- Dimensions: 5 x 1.5 x 1.5 in
- Weight: 5.75 lb (heavy)
- Shape: Hook
- Best-fit access: edges, flanges, and lightening-hole flanges
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Questions about this bar
What is the ETBB37 tungsten bucking bar used for?
The ETBB37 is a heavy tungsten bucking bar for larger rivets and thick structure, delivering maximum backing mass in a hand-held bar. Hold it flat and square against the rivet tail so the shop head forms evenly.
How much does the ETBB37 bucking bar weigh and what size is it?
The ETBB37 weighs 5.75 lb and measures 5 by 1.5 by 1.5 inches. You buy a bucking bar by weight, and tungsten packs that weight into a far smaller block than steel.
Why is the ETBB37 made of tungsten instead of steel?
Tungsten alloy is about 2.5 times denser than steel, so the ETBB37 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.
