Base rnd, each side: Any multiple.
Begin in any stitch.
Rnd 1: Ch 3 (counts as dc), dc in each st around, placing 5 dc in each corner st, join with slip st to top of ch-3.
Rnd 2: Ch 1, FLsc in each dc around, placing 3 FLsc in each corner st, join with slip st to first sc.
Rnd 3: Ch 3 (counts as dc), BLdc in each dc from Rnd 1, placing 5 dc in each corner st from Rnd 1, join with slip st to top of ch-3.
Rnd 4: Rep Rnd 2. Fasten off.
If your hook has a burr that catches the yarn, sand it smooth with 600-grit or finer sandpaper. Buff with a piece of wax paper for a smooth finish.