CrochetingClub - Extended Stitch Instructions: Extended Single Crochet (esc) - Insert hk into st, yo, pull through, yo, pull through one lp on hk, yo, pull through both lps on hk. Extended
Extended Double Crochet (EDC) :: Crochet :: New Stitch a Day
Extended-single crochet vs half-double crochet | forever in fibre
Extended Single Crochet - How To Make It, And When To Use It
The Crochet Basics: The Extended Half Double Crochet Stitch - Magic Owl Studios