hard anodized threaded shock bodies for use on the Vaterra Twin HammersFEATURES: hard-anodized, aluminum constructionpre-install o-rings. (same as stock)the hard anodizing makes the contact surfaces more durable for longer life. Machined threads for easy, precise spring preloaded adjustmentscrew on aluminum o-ring cap eliminates the seal retainer pop off problem. YOU WILL RECEIVE: two CNC hard anodized threaded shock bodiesREQUIREMENTS: Original shock hardware. Shafts, caps, springs and shock shafts. COMMENTS: when installing the shock shaft you should now place a few drops of shock oil on the threads of the shock shaft and then slowly and carefully push the shock shaft through the shock o-ring which has already been installed. description revised by: WP May 30, 2014