Adjustable turnbuckle 55mm with M3.5mm thread for 5.4mm bigger pivot balls. CNC-machined from world-renowned HUDY Spring Steelâ„¢ and hardened with a proprietary solidifying procedure for unbeatable lifespan and dependability. The more expensive 5.4mm pivot balls ensure extended travel concerning the ball bones which reduces the possibility of those popping down. Pair of 2.