National Hardwares 1/2" x 3" Bolt Snap with Swivel Eye is designed to use with rope, chain, strap, animal leashes and other home, farm, and recreational applications. Zinc die-cast body and stainless steel spring for lightweight durable construction. Easily attaches with retractable bolt and pull down trigger. For quick repeated attachments in a wide variety of applications. Swivel eye eliminates tangling. Light Duty Rating with 45 lbs. Safe Working Load, always follow safe working load (SWL) limits included on packaging. National Hardwares Lifespan Limited Lifetime Warranty.