This is a pike press to handstand which I used to do daily in the gym while training for Gymnastics. I haven't done this in years, but recently I began practicing it and started out without being able to even do 1! Now I am up to 3, hoping to get back to doing 6.  I'm using the Perfect Pushups which are very unstable, simlar to doing handstands on the Rings, but not that unstable.  This is a great exercise that works everything!