This skateboard parts set has everything you need to build a complete skateboard - just add a deck and grip tape! You get 5.25-inch (139mm) trucks that fit 8-8.25 inch decks perfectly, whether you have old school or new school deck patterns. The aluminum trucks come with 90a hardness bushings that provide good responsiveness for both street and park skating. The 52mm wheels are 99a durometer - hard enough for smooth slides and good control on tricks, but still with enough grip for comfortable riding. The ABEC 7 bearings are the standard 608 size that fit most skate wheels, delivering smooth rolling performance. The kit includes all the necessary hardware: 1.25-inch screws for securing your deck, 2mm riser pads to prevent wheel bite, and spacers to keep your wheels properly aligned. I've built several boards with this set, and the quality is solid for the price - everything fits together properly and holds up to regular skating. The trucks turn smoothly and the wheels roll well right out of the package. Whether you're building your first board or need replacement parts for an existing setup, this kit saves you from buying everything separately. The components work well together and provide a balanced setup that's suitable for most skating styles. If you have a skate tool (which I'd recommend for assembly), putting everything together is straightforward. Definitely great value for anyone looking to build a complete skateboard without breaking the bank on individual components.