Handbook amount: them includes : 3.0 steel Pin - 2pcs 3.5 steel Pin - 2pcs Product major function & use:
1. Upgraded from aluminum to #45 metal to improve the durability 2. double holes that allow to help for both 6S and 8S the same as initial appropriate 6S and 8S
3.0mm pin and 3.0mm thread area works for 6S initial dogbone CVD 3.5mm pin and 3.5mm thread area would work for 8S initial dogbone CVD