The 3/8"-diameter coated steel rod is tough, strong, and corrosion-resistant. U.V. resistant plastic coating protects the rod butt and handle. And the stem and wing nut are stainless steel for years of corrosion-resistant use. 4" stainless steel stem & wing nut. 5061-3 has a 8" stainless steel stem & wing nut. 5060-3 features a stainless steel shaft (can't rust) and includes 5071 mounting base.