Polypropylyne wheels housed in pressed steel caster, this type of caster wheels are ideal for light duty applications. The casters made of pressed steel, constituting of a dual bearing assembly and are held together using a central kingpin. The kingpin is fastened using a nut and is secured in position by using a power press. Ideal for outdoor applications, these casters are cost effective. However, these wheels are not recommended for epoxy flooring.