I just now installed the casters on an old wooden desk. Installation was very easy with a 1/2" drill bit for the inserts. I dropped the rating by one star because you really can't use the provided washers and jam nuts. With the jam nuts installed, only a 3 or 4 threads of the wheel stem are engaged in the insert so it would be very weak. It would be a 5-star review if they had provided thin jam nuts instead of the thick ones.
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