Indusco Self-Colored Drop Forged Galvanized Steel Stub End Turnbuckle welding should be carried out by a qualified person. The material to which the stub ends will be welded should be of adequate strength to withstand forces during tension. The connecting surfaces must be free from contaminants, dirt, oil, paint. etc. This strong steel turnbuckle has working load limit based on a design factor of 5:1. It is ideal for marine and industrial use and can also be used for recreational activities like zip lining. The turnbuckles must always be inspected for wear, distortion, cracks and damage before use. The loading must be applied in a straight line and not angular.