If you want e.g. to mount two pieces of leather with a nice braid or to enhance the look of a leather plane this will be quite nice.
You start with two parallel lines of holes with a distance of approximatly 2-3 mm.
If you have two pieces of leather you make one line of holes on each piece.
We start at hole 1 of row A and pull our lace through from behind, but we let a bit of about 2-3 cm left.
We push the lace through hole 2 of row B.
Now pull the lace through hole 1 of row B from behind and then through hole 3 of row a from the front.
On the backside we pull the end of the lace through the loop.