4-40 rods with a ball link attached to an aluminum servo arm and a soldered on threaded coupler (Dubro #336) with a metal clevis (Sullivan #S526) on the other end. Use silver solder on the couplers, all should be availible at your LHS. I've never had one fail yet. This is a cheap way to do it and works well for me but there are many other ways to do it, (H9 titaniam links, carbon fiber links...) just my opinion