Mainly divided into lightweight casters (chrome plated bracket circular plug-in rod casters, chrome plated bracket hollow rivet casters, chrome plated bracket screw casters, chrome plated bracket base plate casters) and metal bracket casters (screw type, hollow rivet type, plug-in rod type, base plate type); Full plastic bracket casters (movable/fixed type, screw type, screw stainless steel type, plug-in type, bottom plate type); Medical dual wheel casters (economic screw type, screw type, movable/fixed type, plug-in type), central control casters, and medical bag cover folding brake casters can fully meet various environmental requirements for medical use.