This was originally stainless steel, but is now rigid 6061 aluminum to reduce your weight aloft. If you don’t need the full length, slide it back on the masthead so only part is extending out, to minimize any flexing if the boat is bouncing. Some installers use a rule that 1/3 of the length should be over the masthead. Since it is aluminum, a good option is to drill extra holes to tighten it down at the edge of your particular masthead.
Includes 4 pairs of stainless steel #8 machine screws (5/8-inch) and lock nuts.