Chain slings are exposed to heavy stretching and lifting of very heavy loads. Therefore, signs of fatigue, wear, and tear is a very common problem encountered when using lifting string. When buying a lifting sling, try and find a sling that can withstand fatigue. You should get a chain polyester sling that does not crack when bent by a small radius. Get a lifting sling that can withstand wear and tear to serve you for several years.http://www.z2-lifting.com/polyester-sling/