DubroAbout $14.00 for the complete kit.Kim
I have that centering tool along with several others, I like the Tetra version you can get from Central Hobbies. Robart makes a centering tool but it only works with round hinges like their hinge points. Last year I got a set of the AeroBroach blades, they work very well with the DuBro or Tetra tool. http://aerobroach.com/