Here is a secret that all the outlaws use. This tire grabber disk is sharp, it has sharp pointed fingers that actually grind and cut the tire to bring it back to like new conditions. The key to using this is to lightly let the disk grind the tire from the back to the front (opposite the rotation of the tire) this will keep the leading edge of your tire sharp. Your going to need a variable speed grinder as you DO NOT want to go over 300 rpm with the disk. This is a must for every team. We personally use one so if you have any questions give us a call.