Constructed of polished, clear anodized cast #356 T-6 aluminum. Low profile, the step extends 1-1/2" from mast when folded. Usable tread is 1-5/16” W X 5" L. Adjustable nylon screw eliminates rattling when step is folded. Contoured to fit mast. Installs with four 1/4” FH fasteners or pop rivets (not included)