Small, light and with very flat profile and fast action, this is an automatic with a lot of class. The original 3550 Pardue auto gets a new name and the upgraded Benchmade automatic package with increased reliability and improved access to an enlarged button. The 3551 Stimulus features a 2.99" 154CM spear point blade and aluminum handles. 154CM is an American-made premium grade best all-around stainless steel that offers great corrosion resistance with good toughness and edge qualities.