Made from premium 7075 T6 aluminum this shaft comes in at just 1.3 grams . What makes this shaft nice is in the details. The flat section for the left hub extends all the way to the edge for more width adjustment possibility and the threads for the wheel nuts are longer so that you get proper engagement with locknuts. As a plus, it is compatible with the GL Racing stock differentials and it helps it shed 2.4 grams of rotating weight. It is designed to be used with a 3mm inside diameter spacer on the left hub, just like the GL diffs.