1 – Start by making an unfinished double crochet in a stitch, you don’t do the last step. You have two loops on your crochet.
2 – Make a yarn over and insert your crochet in the stitch, make a yarn over again.
3 – Now, you have 4 loops on your crochet.
4 – Make a yarn over and pull the thread through 2 loops. You have 3 loops on your crochet.
5 – Repeat steps 2 and 4 as many times as necessary.
6 – Make a yarn over and pull the thread through all the loops to close your bobble stitch.
7 – Here, the final result :
Monster Hook 