Bruce lee style pushups

When someone is doing one hand one or two finger pushup..

what does it mean?That his finger flexors are strong or his finger bones are strong?maybe tendons?

same for anton abasov thumbs planche/maltese (

you can ask this guy

http://www.youtube.com/watch?v=7LkhVeW7VV0

It requires very strong finger flexor muscles and tendons. 

Joshua Slocum said:

It requires very strong finger flexor muscles and tendons. 

OK and what with the bones?

And can this help me http://www.google.co.il/imgres?newwindow=1&sa=X&tbm=isch&tbnid=pMzm3NDdZsf1CM%3A&imgrefurl=http%3A%2F%2Fwww.complete-strength-training.com%2Fforearm-exercise-equipment.html&docid=dlgwgb5daeeQYM&imgurl=http%3A%2F%2Fwww.complete-strength-training.com%2Fimages%2Fforearm-exercise-equipment-hand-grippers.jpg&w=479&h=300&ei=W8wNU4uKH4by4QTyy4HABw&zoom=1&ved=0CF0QhBwwBA&iact=rc&dur=213&page=1&start=0&ndsp=39&biw=1920&bih=979

No, the grip strength isn't useful. H1 actually works to solve this type of deficit