Turnbuckles with jaw end fittings are convenient to rig up because they are open (whereas eye & eye turnbuckles are closed), so attaching cables or shackles is easy. The round load pins in the jaw are supplied with cotter keys to keep them securely in place. These turnbuckles are made in the U.S.A. (like most Chicago products). They are made from forged, heat-treated steel with a hot-dip galvanized finish. The load rating is based on a straight vertical load, with a safety factor of 5:1.