WHAT IT INCLUDES: 2 Heavy-Duty Springs SMOOTH & SILENT OPERATION: The springs are tightly coiled together for effective shock absorption enhancing the comfort of your porch swing with every movement. ALL-WEATHER PROOF & RUST RESISTANT: Crafted from durable metal, the two swing hanging hooks are plastic-coated and meant to withstand the wear and tear of indoor or outdoor use. The hangers are made with glass and reinforced nylon plastic around the metal that ensures the longevity of the piece. The comfort springs are made with a high-strength steel, which are zinc-plated and clear-coated to provide protection against the elements and rust-resistant.