Universal ball bearing type, it is compact and stylish. Around the top of the tower was round handled, non-slip and avoid damage shoes. Integrally-molded, made of high strength aluminum alloy, bright color and durable. Anti-slip design provides the best adsorption and comfort for your feet. Seal design with dustproof function, improve the service life; Ball rotation, economical and practical; It is more flexible and durable than other ordinary pedals.