Campbell Chain & Fittings 0722427 Lock Link Single Loop Chain, 3/0, Zinc Plated, 50 ft, Reel. Ideal for sprocket wheel, overhead door chains, general utility use. Standard Material: Low Carbon Steel. Standard Finish: Zinc Plated. Design Factor: 4 to 1. Packaged on Reel. Made in the USA. Do not use for overhead lifting. Do not exceed the working load limit. Material Diameter: 0.15", Inside Length: 1.63", End Type: Wrapped, Working Load Limit: 405 lbs., Links Per Foot: 7.4. Material Number: T0722427.