Extreme Max Shackles are constructed from marine-grade 316 stainless steel, offering excellent strength, durability, and corrosion-resistance even in the harshest marine environments. Do not use in overhead lifting applications. Working Load Limit: 2950 lbs. Shackle Size: 1/2″. See images for exact measurement diagrams. Available individually or in value-packs of two or four.Marine grade 316 stainless steel constructionDurable and corrosion-resistant, will not rustDo not use in overhead lifting applicationsShackle Size: 1/2″Working Load Limit: 2950 lbs.