I had one of those old wooden ones for years until it started falling apart after 40 years of use..and yes, even a gnat turd will hang those up with those metal discs for wheels.
I replaced it with a plastic one with nice rubber coated wheels. Now I have just the opposite problem. If there is any slope to floor I'm using it on, like my carport, I have to chock the wheel to keep from rolling away!
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Greg Reid
Palmetto, Georgia
 
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