When I sent in a ZT350 to be refurbished, broken spring assist, chipped edge, crudded up joint, I bought a 566 Hinderer with ELMAX steel. The 350 sits in reserve for when the 566 goes down. When I broke my old Leathermen Super Tool I sent it back and Leatherman sent me the new Super Tool with an improved design.
Both companies have great products and great customer service. When I think of a pocket knife it think of something that actually slips into the pocket. My favorite, it's a little big, it the Old Timer large trapper. For years I carried a Buck 110 and the Trapper. I never felt under equipped.