Astro Pneumatic. 5pc 3/8″ Nano Drive Size Adapter Set. • Works best with Astro 78310 & 78318 Flex Head Ratchet Wrenches for 3/8″ Nano Sockets. • 3/8″ drive 17mm outside hex adapters for your Nano ratcheting wrenches allowing them to drive and retain traditional socket and hex bit designs.
