Constructed of heavy guage stainless steel and are made in the USA. All tips have dull points and won't put a hole in your wet suit or dry suit. The 15-inch “Florida Special” stringers are made from 1/4” steel and are big enough for 4 large fish or 15-20 small fish. The "Big Man" stringer is made from 5/16” steel and is big enough for 6 large fish or many small fish!!