National Hardware's 3/4" x 3-11/16" 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 lightweight durable construction. Easily attaches with retractable bolt and pull down trigger. For quick repeated attachments in a wide variety of applications. Bolt Snap is easily operated with one hand, perfect for quickly and easily securing ropes and chains. Light Duty Rating with 120 lbs. Safe Working Load, always follow safe working load (SWL) limits included on packaging. National Hardware's Lifespan Limited Lifetime Warranty.