The typical Case Humpback Whittler Knife has three blades with nail nicks for opening and a distinctive humpback handle that is 3 5/8" long. Humpback Half Whittler Knives have only two blades and the same humpback handle. Many Case Humpback Whittler Knives have stainless steel blades; Humpback Whittler Knives with carbon steel blades are denoted as Chrome Vanadium steel. Each Case Humpback Whittler Knife is proudly made in the USA.