PedBeater,
Druss is right, two sets of mounting holes. It's okay fine until you get into the 600 size helicopter. 450's and 300's mountings are the same size.. Great price too!
Dave / Choppersrule
ORIGINAL: PedeBeater
Thanks a lot Druss, you have been a great help. It would be better if they specifide all of this stuff on there site.

The quality always turns out good though.
Thanks again for your help.