Three-Needle Bind-Off
Three-needle bind-off joins two sets of live stitches while binding off, creating a sturdy seam often used to join shoulders.
Explanation
Three-needle bind-off is used to join two sets of live stitches, such as two shoulder pieces, without sewing them together afterward. You hold the two pieces with right sides facing each other, knit one stitch from each needle together using a third needle, and then bind off as usual. The result is a visible but sturdy and neat seam that is quick to work and often gives a better result than sewing shoulder seams by hand.