TouchDown RC2T damper features rebound adjustment, independent high and low speed compression adjustment, and an easy-to-adjust threshold lever for added pedaling efficiency Adjustable hydraulic bottom out has five compression settings at the fingertips to customize the amount of bottomout resistance in the last 20% of travel 20 clicks of rebound adjustment offer a wide range of tunability and accommodate more rider types Rebound knob pulls out to reveal a 3mm hex wrench that can adjust both high speed compression and hydraulic bottom out Spring sold separately