What a cracker!
What's not to like about really nice tools? How can I not get excited about one as flash as this set up!
Use the ratchet with one of the 18 bits directly or the adaptor and one of the 5 sockets.
Pop the 60mm quick release magnetic bit holding extension into the ratchet and bingo a very useful tool.
The problem with this kit was always the lack of a 12mm socket. I have sourced a separate, matching one and added it to the set. Usually $9 each.