If you already own a Delica or Endura, you have one of the bestselling knives Spyderco makes. These models are a bit different from the normal C10 Endura4 and C11 Delica 4 Lightweights. They are in a range of handle colors with full-flat ground blades. Their FRN (fiberglass reinforced nylon) handles come in vibrant tones including blue, green, brown, gray and purple. The blades are full flat-ground VG-10 with a thinner highly refined cutting edge and a larger 13mm opening hole. Added to the blade's spine is slip resistant jimping.