There are no cables included in this set, as it is intended to be an addition to other Click sets. These hooks will fit any of the Click cables to form a regular crochet hook or a Tunisian hook for those unique projects. If you only want the crochet hooks and don't already have available cables, there is a simple enough solution.
Since the crochet hooks themselves are similar in size to normal crochet hooks, it is possible for someone to attempt to simply crochet without the cables. However, I personally wouldn't advise it because I think the uncovered end has too much potential to snag on your project or even end up scratching you. Besides, by adding this cable set, you can open up your crafting to Tunisian or afghan crocheting.
Also, here's a great tip for picking up a large amount of stitches, as for the edges of a blanket or the border of a cardigan; you simply unclick your Addi needle and click your Addi Hook onto the cable. The crochet hook makes it SO much easier and much less tedious than trying to pick the stitches through with the tip of your knitting needle. Once you're done picking up the stitches and you're ready to knit again, just detach the crochet hook and reattach your needle and you are ready to go!
I admit, I am a little bit of an Addi fanatic but I bear that badge proudly-after all, they're worth it! I'll end this post with a few more pictures of the set.