This technique includes : 3.0 metal pin - 1pc 3.5 steel pin - 1pc product major function & usage:
1. Upgraded from aluminum to #45 steel to boost the durability 2. double holes that help to guide for both 6S and 8S just like initial Appropriate 6S and 8S 3.0mm pin and 3.0mm thread opening works for 6S initial dogbone CVD 3.5mm pin and 3.5mm thread space works for 8S initial dogbone CVD