Both tools are USA made vintage and in good condition. Both are 3/8 drive. The 18 mm socket is 2-1/2 inches long and 6 point. It has a rare finger grip collar/band, or wrap and is extremely hard to find. It displays model 42616 and 18 (mm size) on the collar. Also on the collar, in very small print is "craftsman usa pat pend". The swivel adapter is model 4435, designated -GK- and has a very nice tight joint, overall minimally used. Both items are in excellent overall condition. More rare and vintage tools in seller details. These tools ship BOXED for $6.95
eBay