Review on 3/4-inch Thick Reducing for Various Applications by Darrell Kiley

Assume 1/2", 5/8", 3/4" ID/OD sockets. Diameter 0.588", which is much closer to 15mm (0.590") than 5/8 " (0.625). Ditto for the OD of the same bushing, OD 0.786 inch, which is closer to 20 mm (0.787 inch) than 3/8 inch. 4 inches (.750). Aside from being incorrectly described as SAE/imperial unit measurements, the QC is underwhelming; They don't mate like higher quality jacks like the German made jacks in the GRND store, also sold here at Revain. twice the price but sometimes you get what you pay for.