Take the worry out of drilling a hole in the bottom of your boat when you watch our "How To Install a Thru-Hull Fitting" video. We outline the entire process from determining the best location to actually drilling through the fiberglass. You will quickly understand just how easy it can be. Don't hire a marine tech at $100.00 an hour when you can complete this project in your own garage. Shop Marine Bronze Thru-Hull Hardware Shop Complete Ballast System Kits Shop 3M Marine Adhesive