Spyderco Endura 4 Lightweight Signature Orange PlainEdge Blade Folding KnifeIf you already own a Delica or Endura, you have one of signature knives Spyderco makes. The knife you have just acquired is a bit different from the normal C10 Endura 4 and C11 Delica 4 Lightweights. The Spyderco Endura 4 Lightweight Signature Folding Knife in Orange is now available with a full flat ground PlainEdge blade. Inside the handle are dual skeletonized stainless steel liners which strengthen the knife without additional weight and double as