95WNiFe aircraft tools tungsten bucking bar price which density is 18.0g/cm3 is 137.00USD/PC on Feb. 24, 2020. Tungsten bucking bars weigh almost twice as much as conventional steel which helps with reducing vibration as your rivets will require less blows to set them. When conventional steel bucking bars in a confined space you have to hit the rivet too many times causing the material to work harden you can use a heavy enough bar to properly install the rivet without work hardening .