The original 3550 Pardue auto gets a new name and the upgraded Benchmade automatic package, the Stimulus 3551 is now made with increased reliability and improved access to an enlarged button. While the size is still small and light, the updated Pardue design still features the small size making it convenient for everyday carry. The 3551 Stimulus features a 2.98 inches long 154-CM stainless steel spear point blade that offers enhanced tip qualities (false double edge). Push-button automatic blade action snaps out fast. The black anodized 6061 T-6 machined aluminum handles are comfortable and thin. The sliding safety works without a hitch. 154CM is an American-made premium grade best all-around stainless steel that offers great corrosion resistance with good toughness and edge qualities.