Originally Posted by
Koogar
Thanks, Taras and BPuke.
Material is neither - we stuck with solid aluminum bronze for its wear characteristics. They are pretty overbuilt in every dimension, too. You could use a sock full of these things for self defense.
This pair of inserts looks a little worse for wear because they've been played with throughout the fabrication process. They're bright and shiny when freshly machined.
That's a VERY smart use of this material. Very "out of the box", creative, and innovative use of it. Should allow the track nuts to get a very good, deep bite on the dropout without falling apart over time.