Replacement axles for your Vault pedals.Sizes : 9/16"NB:Axle with the groove and uses the right had thread nut is the left hand (non drive side) axle. This axle tightens into the crank - aniclockwise. / Axle without the groove and uses the left had thread nut is the right hand (drive side) axle. This axle tightens into the crank - clockwise.