Bravo! Sports Boys Kryptonics Destroyer Inline Skate Boot has push button "Quick Adjust" System allows the skate to grow with the foot Easily adjusts to four different sizes without the use of any tool, One safety buckle with hide away strap, power strap and lace system for closure Chassis is impact resistant polymer, Features a single removable brake Wheels: 64 mm X 24 mm PVC, Bearings ABEC-3 Fits boys size 1-4