Invest 40 st b / n
Do not grunt work (all rows only on the front side) 40 st / n for the back of the hinge.
Knit with a thread of a different color. 5 st w / n for the back of the hinge, * st s / n in the loop of the bottom row, 10st b / n behind the back of the hinge *
A thread of a different color is 6 stb / n at the rear behind the back wall of the hinge, * st c / n in the loop of the bottom row, 10 stb / n behind the back of the hinge *.