Stainless Steel Stud Mount Handrail - 18"The Stud Mounted Hand Rail features integral 5/16”-18 threaded studs and installs with two 5/16”-18 nuts (not included). Constructed of formed 304 stainless steel for corrosion resistance and durability. Designed to provide a sleek, smooth handrail transition to the mounting surface your boat. Functional and attractive, with no visible mounting hardware.