Wera 134399 870/4 SB SiS 1/4″ Hex To 1/4″ Square Drive Socket Ratchet Adaptor Bit 50mm

The Wera 870/4 SB Bit Adaptor from IST is a tool shaft for manual nutsetter inserts.
The adaptor has a friction ball for manual nut spinner sockets. It has a ¼” square head along with a ¼” hex drive.