Folding pocket knife EDC Demko AD 20.5 Shark-Lock. Length of the closed knife: 10,16 cm. Length of the blade: 7,62 cm. Clip Point or Wharncliffe type blade, stonewash finish or black DLC coating, depending on the version. Ambidextrous lugs for one-handed blade deployment. Lanyard hole. Pocket clip. Left-handed pocket clip included. Designer: Andrew Demko. The AD20.5 pocket folding knife from Demko Knives is a sturdy folding knife, ready to take you through your day and tackle all your cutting needs. The AD20.5 is available in two blade shapes (Clip Point or Wharncliffe), three steels (AUS-10A stainless steel, D2 tool steel or S35VN stainless steel) and two finishes (stonewash or black DLC coating). The shark lock locking/unlocking system is both easy to use and very secure. This is a real plus in favor of the AD20.5 because both the safety and the ease of the shark lock system allow you to feel confident with the DEMKO AD20.5 when using it, even for sustained and forceful tasks.