The Turnbuckle Assembly Eye and Hook from Grainger is a galvanized steel turnbuckle with a working load limit of 550 lbs. It has a hook on one end and an eye on the other end, with a length of 6 inches when fully closed and can extend to 12 inches when fully opened. The turnbuckle barrel diameter is 1/2 inch and it uses 3/8 inch diameter pins. This turnbuckle can be used for tensioning wire cables, securing structures, and other tension adjustment applications. It meets ASME B18.15 requirements.