When they set out to improve upon the venerable No.5 Kadee knew it had to be just as game-changing as the original. Often referred to as the "Whisker version of the No.5", the #148 has dethroned the classic #5 with an even longer-lasting and more reliable design. They took everything you loved about the No.5 and improved upon it. No more fumbling with centering springs. No more multi-piece assemblies. The Whisker series of couplers is a true drop-in coupler. Use Kadee Whisker couplers in your next model and enjoy the most reliable and smooth coupling experience you've ever had. Always made right here in the USA with legendary Made In America quality.