Originally Posted by
RenDaHai
@ Eugene,
In a lot of the more traditional schools the vast majority of strikes are done this way. Its generally referred to as a hammer. Its kind of like doing a downwards hammer fist but using it in all directions. Its not with the 'pinky' but with edge of the hand and parts of the palm. Its generally quite blunt. If you get it right you can hit a rough brick wall full power without hurting yourself, which you can't do with an ordinary fist. Generally used in powerful movements. Can strike anywhere.
If you watch more of Wugulun schools videos (dejian, wunanfang etc) you will see they almost never use a fist, they nearly always use this type of hammer, even on 'straight' punches.
As Sal said, it is an internal strike. I can't go too far into the specifics, but the wrist is often turned up slightly so the centre of the palm faces into the strike. (this is important).