2 knives in 1 new twin blade design allows the user to alternate between 2 blades without carrying more than 1 knife, "InstantChange" feature allows the user to replace dull blades in seconds, easy access blade storage holds up to 9 blades for fast and easy blade change, interlocking blade sliders so that only 1 blade is extended at a time, rubber comfort grip minimizes fatigue and reduces slippage, total blade storage capacity11 (9 storage + 2 in use).