Square Shaft (SS 5) Lead Section, 7 ft (2134 mm) long with 8 in (203 mm)- 10 in (254 mm) -12 in (304 mm) Helices. Caution: All components of the Chance anchoring system are performance mated. Use ofother anchoring products or equipment will not necessarily produce the same results. Ultimate strength ratings apply to properlyinstalled anchors only. Failure to install within 10 degrees of alignment with the guy load may significantly lower strength.