For fresh or saltwater rod holder is made of marine board construction and stainless steel hardware. Each hole is 1-1/2″ with 1-1/2″ set holes to keep the rods in place when vertical storage. Rod holder has screw in base if you decide to screw down to the dock. Holds up to 18 rods. Heavy-duty 1/4 marine board construction. Weighs roughly 20 lbs. 28.7″ x 9.35″ x 7.9 dimensions. 0.8 marine board thickness. Perfect for garage or closet storage. Keep your lines untangled and organized!