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Spinner/Swivel included starting 6/20/2017! DURABLE MATERIALS: The 8 foot strap is made of commercial grade nylon and is able to withstand harsh winters and brutal summers without showing signs of wear while the carabiner hook is made of industrial strength steel making it nearly indestructable.
ENHANCED SAFETY FEATURES: Due to the high strength nylon we use in our tree swing kits, each strap holds up to 2200 pounds, and the spinner does too. To prevent the straps from coming off while swinging, we designed our carabiners to include a heavy duty screw lock.