Check out this Immobilizer from Bull's Eye. This is a great knife for the beginer thrower and the expert.  This knife gives you the ability to change the balance of the throwing knife by changing the position of the weight on the handle.  The weight moves and thus the balance is changed.  This is like having 10 throwing knives in one knife!

This knife is a full tang, 10 inch thrower made  of solid 440 stainless steel.  It is thick and heavy duty.  Comes with alan wrench to move and tighten weight.   Comes with a nylon sheath.