National Hardware's Bolt Snap is designed for use with rope, chain, strap, animal leashes, and other home, farm, and recreational applications. Zinc die-cast body and stainless steel spring for durability. For quick attachment For interior and exterior applications Easy bolt retraction with pull down trigger Stainless steel spring Open fixed eye Lifespan Limited Lifetime Warranty Designed to use with rope, chain, strap, animal leashes and other home, farm and recreational applications