Specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kt company. we have a large product line including aluminum drift boats. Designs available in steel…. steel is an excellent boatbuilding material, proven in use worldwide. however, due to the relatively high weight compared to. Save $1000s by building your dream boat with only a few tools and a little sweat equity. we are your one stop shop for customizable aluminum boat kits..