Description: Are you looking for professional and affordable casters? Are you looking for a sturdy, trusted tool that can do multiple jobs at once? If yes, look no further than our professional casters have to meet your needs. It is one of your best options. Features - Color: Silver. Dimensions: 28 x 10 x 10 cm. Material: Metal and Rubber. 4" door casters with adjustable spring brackets are designed to allow doors to open and close freely. It has a 50-60kg load rating and a spring-loaded clip that does a job when the casters roll over rough or uneven surfaces.It also has universal brackets for wooden or metal doors. Heavy-duty spring-loaded gate casters adjust to surrounding terrain to maintain gate height throughout the opening and closing cycle. These swivel supports work equally well on horizontal and uneven exterior surfaces such as asphalt, brick, concrete,dirt, grass, gravel and pavers.