9pcs Cr V 50 250mm Drive Extension Bar Socket 1 4 Inch 3 8 Inch 1 2 Inch Adapter Sleeve Connecting Rod Ratchet Wrench Hand Tool Buy 9pcs Cr V 50 250mm Drive Extension Bar Socket 1 4 Inch
Probably 1/4″ and 3/8″ noting you don't need duplicate sockets in both drive sizes For automotive work you'll need 1/2″ too 1/4″ and 1/2″ ranges overlap, although there are places where a 3/8″ drive socket will fit but a 1/2″ won't and a big 1/2″ drive makes overtorquing a 3/8 is the most common for general work and the most common I'd start there, or with a "set" that includes it and the 1/4" 1/4" normally is for smaller work, #4 to say #10 hardware 1/2" is for the really big jobs;
