Rollers are one of the most important parts of tuning your scooter. With the right roller weights you can get the most out of your scooter. In the past the only option has been to purchase multple sets of expensive rollers to see which worked best. This kit contains six sets of six rollers and costs less than two sets of normal rollers. With this kit you can combine the different rollers to form a total of 11 unique weights. Do yourself a favor and make sure you have the propper tool to get your scooter dialed in.