There's a word Ambidextrous (both handed)

I did not notice mine until recent years - I write with right hand, I throw basket ball with right hand, I play tennis with right hand...

However, I can only throw stones /dots /baseball /football with my left hand. I drive with my left hand on steering wheel. And I do a lot of small things that does not requir skills with left hand (e.g., pick up very samll object, unscrew a bottle cap etc). I do use chopsticks very well with both hands. I thought I was an Ambidextrous person but 'tests' suggest that I may be a left-handed.

http://www.youramazingbrain.org/Brainbody/hometest.htm