3-Needle Bind Off
The 3-Needle Bind Off is a method of binding off that joins two sets of live stitches. It is often used at the shoulder to join the front and back of a sweater. In addition to being a bind-off technique, it is also categorized under seaming as it makes a neat, solid seam. If you hold the right sides of the knitting together before you bind off, the seam will be on the inside of the fabric. If you hold the wrong sides of the knitting together, the seam will be on the outside of the fabric.
Hold the two pieces of knitting together with
the points facing to the right. (The example shows wrong sides
together.)
Insert the third needle into the first
stitch on each of the needles knitwise, starting with the front
needle.
Work a knit stitch, pulling the loop through
both of the stitches you’ve inserted the third needle
through.
After you’ve pulled the loop through, slip the
first stitch off of each of the needles. This takes two stitches
(one from the front needle and one from the back) and joins them to
make one finished stitch on the third needle (held in your right
hand).
Repeat this motion, inserting your needle into
one stitch on the front and back needles, knitting them together
and slipping them off of the needles. Each time you complete a
second stitch, pass the first finished stitch over the second and
off of the needle (as you would in a traditional
bind-off).
As you progress along the stitches you will see
the seam begin to appear.
First, you will knit two stitches.
Lift the first knitted stitch with the tip of
your left needle.
Pass this lifted stitch over the other stitch on
the right needle and let it drop off of the end of the needle
(psso).
Knit the next stitch so that you have two
stitches on your right needle again.
Continue to repeat this process until all
stitches have been bound off.
To begin, cast on 3 extra stitches at the
beginning of the row you’re going to bind off. (You can do this
using the 
*Next, knit two stitches and slip the third stitch
knitwise.
Knit one more stitch. You will now have 4 stitches
on your right needle.
Use your left needle tip to pass the slipped
stitch over the last knitted stitch. This will leave you with three
stitches on your right needle.
Slip these three stitches back onto the left
needle tip, purlwise. Tug on the working yarn to tighten up the
stitches.
Repeat these steps from * until only three
stitches remain. Cut the yarn and draw through the remaining
stitches.
Begin by cutting the working yarn to about
twice as long as your finished piece of knitting. Thread that yarn
onto a needle.
*Pass the yarn needle through the first two
stitches from right to left.
Pass the yarn needle through the first
stitch on the knitting needle from left to right.
Drop the first stitch off of the knitting
needle.
You will be left with a flexible edged bind
off.
*Draw the needle and yarn through the first
stitch from left to right and drop the stitch off of the
needle.
Insert the needle from right to left into the
second stitch on the left needle.
Now back up and insert the needle from right
to left into the first stitch on the left needle and drop the
stitch off of the needle.
Finally, draw the needle through the second
stitch on the needle knitwise from the back side. This can
be accomplished in two steps by doing the following: 1. Draw the
yarn in between the first two stitches from front to
back.
2. Insert the yarn needle knitwise into the
second stitch.
Repeat from * until all stitches are bound
off.
