LOCKING BRAKE: Each caster wheel come with an individual brake, which locks both the wheel and swivel simultaneously SUPERIOR QUALITY: High quality stainless stand, enhanced steel column and plate enables each caster wheel to withstand up to 500 lbs NOISE-FREE ROLLING: With polyurethane, these wheels makes movement easy and noiseless; The castors will glide smoothly and not scratch your hard wood floors VERSATILE APPLICATIONS: Perfect caster system for flight cases, home furniture and industrial trailers