HIGH PERFORMANCE 3-PIECE FLEXIBLE COUPLING HALF New, KTR ROTEX high performance 3-piece flexible coupling half. Ideal for connecting engines or electric motors to pumps, drive shafts, etc. A complete 3-piece coupling consists of two coupling halves from the same series and one corresponding flexible insert. Coupled length is the overall length of an assembled 3-piece coupling. Solid steel with cross-clamp.