Opening M4 

Step 1a

Make a small loop and hold between the teeth..

Step 1b

Insert H away from you into the long hanging loop.

Step 1c

Rotate H in passing distal to ulnar H string and proximal to radial H string.

Step 1d

Insert 5 away from you into the small loop held by the teeth.

Step 1e

Release the teeth and extend.

Done.