Roll-Line's estrattore (bearing press) is used to insert and remove the bearings in each wheel. 
 
Soluzioni
We like to provide solutions! The estrattore is not necessary when you purchase one of our Soluzioni, such as Complete Skate Packages (CSPs) and Bearing-in-Wheel Combos, because our combos arrive with the bearings inserted for you. However, when neither of these two scenarios applies because you're purchasing wheels and bearings separately, you will need an estrattore (or access to one) to insert two bearings into each wheel and get rolling.
 
ProGuide
This tool is used exclusively with wheels and bearings. See our ProGuide on Bearings and Wheels to continue learning.