ST Racing Concepts STA80096BK Aluminum Front Threaded Shock Bodies with Collar for The Exo Buggy, Black Upgrade your stock Axial EXO Buggy shocks to stronger; smoother and more precise to our threaded shock bodies The threaded shock bodies allows for fine ride height adjustment with the included threaded spring collars The spring collars features pre-installed O-rings inside that help hold the shock spring pre-load position firmly in place