New locking spring cups for the 1/10Th Slash 4x4, Slash 2wd and Stampede 4x4 and most all of the Traxxas 1/10 shocks! Probably the most common failure on these trucks are the stock plastic spring cups popping off. With our exclusive design you will never have that problem thanks to these alloy locking clamps (be sure to use blue thread lock for the included screws). 4 locking cups per set with hardware. Easy install and removal.