What good are string dampeners that don't last? Bowjax has answered with a string dampener that is crossbow tough and up to Bowjax's quality standards. Bowjax started with the proven effectiveness of the slipjax string dampener and made it thick enough to withstand many, many shots from even the strongest of crossbows.If you're looking for the toughest dampeners that will really work, then you can count on Bowjax.