Simply tighten the topmost knurled nut to compress the rubber for a snug fit.
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. Listing is for a set of four (4) Service Caster Series #20 1-5/8" expanding stem stainless steel swivel casters, two (2) with top locking brakes, with 3" diameter by 1-1/4" wide red polyurethane wheels capable of supporting a total weight of 1,000 lbs.Count on us to move you forward.