Edgit Piercing Crochet Hooks Ammee's Babies For Crocheting Edges Set of 2 Crochet hooks have an optimal tip for smooth piecing there is no need to punch holes and they can pierce through two layers of flannel They work with fingering yarn 7-8sts/inch and #5 and #10 crochet cotton This package contains two 5 inch tall metal crochet hooks