Benchmade Pardue 531Benchmade Pardue 531. The 531 Pardue is ultra lightweight and very thin, you'll hardly even know it's in your pocket. The black and gray herringbone pattern G 10 handle helps keep the knife's weight down but maintains its durability. The AXIS lock, dual thumb studs and reversible pocket clip make the knife usable for right and left handers. The Pardue 531 features a satin finished blade with a plain cutting edge.