Most users of Grade 100 chain are using it for overhead lifting. When that's the case, then quality really counts! Crosby Spectrum 10 Alloy Chain is extremely high-quality. It is heat-treated and 25% stronger than Grade 80 chain. A black Thermadep coating provides corrosion protection. The chain is proof-tested to twice the Working Load Limit, and identification marks are permanently embossed on the chain. Safety factor of 4:1 with certification available. We sell it by the full drum to offer the deepest discount possible. If you don't need a full drum of bulk chain, then we do offer American Made Grade 100 Alloy Chain By the Foot.