Lockable 360-Degree Swivel Casters: The swivel wheels provide effortless movement for heavy appliances and furniture, with a locking mechanism for added stability 360-Degree Wheels 4 flexible swivel casters rotate easily with 360 degrees of movement. To keep appliances in place, simply switch the pedals to lock the wheels Upgraded Materials & Design - The sturdy stainless steel and polyurethane casters with dual ball bearing design can hold up to 300 lb and provide smooth and silent movement that is gentle on floors Universal Use - The mobile roller is meant to be placed beneath appliances like refrigerator, washing machine, dryer, etc. It provides easy mobility and maneuverability when collecting and transporting heavy loads