This was achieved through use of clinker (lapstrake) construction. It was of lapstrake construction fastened with iron nails. All three firms made wooden lapstrake outboard boats. Cruisers claimed to be the foremost lapstrake boat builder in the world. They were originally designed and built in marine plywood using glued lapstrake construction. The Gold Cup Race rules barred hydroplanes, but allowed lapstrake hulls. Their signature boat was the lapstrake lake runabout of the 1950s and 60's. T & T also made wooden lapstrake outboard and inboard/outboard boats. The first product was a modified lapstrake canoe, dubbed the "Anti-Leak" canoe by the brothers.