Modern day ratcheting wrenches are NOT all manufactured by one plant. Danaher/EASCO owns and enforces the GearWrench trademark and patents, and operates factories in Taiwan (Lea Way) and China (Sata).
Stanley and it's subsidiary companies' ratcheting wrenches are manufactured in a Taiwanese plant (Hi-Five, Chiro).
Kabo is another Taiwanese company that manufactures high-end rat. wrenches for Matco, Mac, SK, Ez-Red, and even those Pedros.
Infar in Taiwan supplies Harbor Freight and Kastar.
Cendai in Taiwan supplies parts for Blue-point and Snap-on.