SPRING TENSION ADJUSTMENT KNOB: At Griffin, we know that all drummers are not created equal. With that in mind, we added a spring tension adjustment knob that you can turn left to increase the pedal tension, or turn right to decrease the pedal tension. This adjustment knob allows personal settings for drummers who want a tighter firmer pedal action or looser for a smoother action. 1-YEAR WARRANTY All products we sell from laptop stands, recording studio equipment, disc jockey accessories and dj stands, to stage equipment and stage lighting packages, and everything in between comes with our exclusive, 30-day money back return policy and a premium 1-year warranty! All you have to do is contact us within 30 days to request a return, or within 365 days from purchase to request a warranty replacement.