With a quick interchangeable chassis, can switch between roller or inline skates. Skate and comfortable boot adjust up to 3 sizes, 3 to 6. Made by the Rollar Derby skate Co. These skates have urethane wheels for gripping, inlines have non-marking brake on right skate. Barly used, in great condition. With X-mas around the corner, will make an lasting gift. Do not have original box.