One hook. Why get a single crochet hook tip?
Extras of your favorite sizes, of course!
Try out...
Tunisian crochet (you’ll need a cord and an end button, too)
Double-ended crochet (you’ll need a cord and two Denise Crochet Hook Tips)
Tunisian in the round (you’ll need a cord and two Denise Crochet Hook Tips)
Picking up stitches in knitting (attach to a cord, pick up the stitches, switch back to knitting needles, and away you go!)