Vitalift premium quality Grade 80 and Grade 100 Chain Slings are assembled with Thiele Chain from Germany. The Grade 80 chain is forged from high grade alloy steel and then heat treated to fine tune their final properties. The chain is continuously monitored in a series of elaborate routines that are carried out at Thiele's in-house testing and laboratory facilities. These include comprehensive crack testing of all forged components. The Grade 100 is approximately 25% stronger than the equivalent grade 80 component which translates into about a 30% reduction in weight.