You can spend a lot of time searching in vain for a 2.5″ desk grommet power outlet to fit firmly in the wire-routing hole of your desk. After painstaking googling, here’s the best solution I found by far with 5/5 stars on Amazon. It comes with hardware for edge mount and through-hole mount from 2.0″ (maybe slightly smaller) to 3.0″ holes. I ended up buying it locally at Home Depot and it’s high quality. Recommended.