This common increase can be used in a variety of situations, from one side of a thumb gusset, to knitted lace, to top-down raglan shaping, and more.
The mirror image of this increase is the Left-leaning Bar Increase.
This is the mirror-image increase to the k1fb (knit 1 in the front and back loop of the same stitch) increase. While that increase creates a little bar that wraps around the bottom of the left stitch, allowing the right stitch to continue the column of knit stitches, this increase wraps the bar around the stitch on the right side.
I have not found a common abbreviation for this increase, so I refer to it as the BincR (Bar Increase Right).
This increase is used in the following patterns:
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