Simply tighten the topmost knurled nut to compress the rubber for a snug fit.
3 Inch SS Blue Polyurethane Swivel 1-1/4 Inch Expanding Stem Caster Brake, 2PK The luxuriously polished stainless steel finish resists rust and corrosion in indoor or outdoor applications where moisture is a factor, while the non-marking, non-marring polyurethane wheels perform especially well on hard surfaces such as concrete, tile, and wood. The Series #20 features an innovative expanding stem that can easily adapt to the inside diameter of the opening, allowing for a secure fit in round or square tubes. This versatile caster is ideal for work tables, shop projects, or any equipment with round or square tube legs.When searching for a reliable and durable solution to your caster needs, look no further than the Service Caster Series 20 stainless steel expanding stem polyurethane wheel casters.