S.R. Desert Camo Transformers Mechanical Folding Knife Best Buy, Best Choice for Survival, Fishing, Sailing, Craft, Hunting or Camping Gear (Small Version) Condition: Brand New in Original Box Blade: 440 HC Stainless Steel Blade Length: 5.0cm Overall Length: 12.0cm This knife is very wonderful, different from others. how to open and how to close? It will give you an answer when you get it. I think you must be very interested in this knife.