For this method you will use bulk hair to incorporate the extension, just as other methods such as Haipolice, Prostyles, etc... Keeping tension is the most challinging part! It will want to slide away from the scalp! The braid is soooo tiny, but you'll get it! Practice!

Start with a basic three strand braid. Your section should be tiny, apx. 1/8" (or smaller) I think mine could be smaller.I'm still working with this method!
 
After you braid about 1/4" down, youll use your latch hook and place it between these divided sections: one being soley the extension strand and the other- the natural hair along with the other end of the extension strand. They will be separated from the eachother. So, you'll have 2 strands on one side and 1 on the other.

**Allow page to load completely before clicking the images below.  doing so will enable you to get a larger view of this technique.



Wrap the 1 EXTENSION strand around the latch hook and previously divi
ded 2(natural+extension) strands of hair.



Once wrapped twice put the strand in the*hook* Pull down. This sometimes is difficult because of the tension. Be patient! I sometimes use my rat-tail if I can see the "loop" come through.



Once it's pulled completly through...you're done!

I've included a few pix for scale and comparison to what I think a pinchbraid would be in size..




Tutorial courtesy of Gia E..