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. Aluminum is a sheet material with virtues aplenty. to honor them best, i advocate simplicity, ample framing… and yes, even single chine hull shapes! for things that. All designs for aluminum construction are included here. for further study, we have books available in the books, dvd’s and audio section of our store at your left..