This is a standard 5/16" x 3" S-hook. Our commercial quality S-hooks are designed to fasten chain to swing hangers and swing seats to help prevent binding. They are plated to resist rust.
S-hooks that are not bought from a playground manufacturer do not have the quality control and have been known to break with the first swinger. This product should last 2 years in harsh conditions and up to 5 years in optimal conditions. Some conditions may require replacement sooner. Tensile strength 1126 lbs.
JSPH145-12, JSPH145-24, JSPH145-48, JSPH145-96