Ah, sounds like you have something like these:
http://www.impaktrc.com/product_info...oducts_id=1036
what you want then is these:
http://www.impaktrc.com/product_info...products_id=58
I did have them a while back shortly, but sold them off because I didnt like how narrow the Phaltlines are- 'fickle' is a good way to describe my choices sometimes....
Good hexes though, very sturdy and good fitment.