With 4 different models to choose from: 45 kg with a tension of 40 kg. 70 kg Most weightlifters can't close it the first time they try. 90 kg If you are strong enough to close the tensioner completely, you have exceptionally strong hands. The 90-kg turnbuckle sets the strength standard for top athletes. 110 kg Once you've mastered the 90 kg, you can certainly start thinking about the 110 kg turnbuckle lockout. Note: The unit of strength is considered a reference only.