3-Needle Bind Off
The 3-Needle Bind Off is both a bind off and a seam. It joins together live stitches from two pieces. Using a crochet hook makes for a quicker and more uniform finish.
Step 1: Position the two pieces so the right sides (or wrong sides — this will always be specified in my patterns) are facing each other, and the needles are parallel.
Step 2: Insert a crochet hook into the first stitch on the front needle, then the first stitch on the back needle at the same time.
Step 3: Wrap the yarn around the crochet hook knitwise and draw a loop through both stitches, dropping the stitches off each needle. There will be 1 stitch on the hook.
Step 4: Repeat Step 2, then wrap the yarn around the hook knitwise and draw a loop through both stitches. There will be 2 stitches on the hook.
Step 5: Pull the first stitch through the second stitch on the hook to bind off 1 stitch.
Repeat Steps 4 and 5 until all the stitches are bound off. Cut 8" [20 cm] of tail and pull the last loop through to fasten off.