Subject: How does a 'pocket torch' work?

I came across a lighter the other week.  It's called a pocket torch,
and the blue pointed flame it produces is VERY hot.  It can turn a
soya bean black in less than a second.  
The pocket torch is no bigger than a lighter, and it uses butane 
gas, which is the same fuel used in ordinary lighters.  When i removed the 'head' of the torch and lighted it, it became just like
any ordinary lighter.  The 'head' is a ring with small holes forming a 
circle.  My guess is the flame is concentrated into a single point,
but i'm not sure....  I really hope you can help me with this.  Thanks!
the 'head'

Re: How does a 'pocket torch' work?