95WNiFe tungsten bucking bar price which density is 18.0g/cm3 is 81.50USD/PC on Dec. 3, 2019. Tungsten bucking bar rivet blocks reduce vibration and kickback while riveting in aircraft operations. Repeated vibrations can cause wrist strain and fatigue, and regular steel bucking bars don't fully protect the riveter from the harmful effects. Tungsten, over twice as dense as normal steel, absorbs the shock, allowing you to rivet more effectively for a longer period of time.