Fallkniven GPdi Gentleman Pocket Knife Desert Ironwood, Lam.Cos Satin Blade (3.07")Fallkniven GPdi Gentleman Pocket Knife The Fallkniven Gentleman's Pocket Knife (GPdi) is made of Laminated Cobalt Steel, or Lam. CoS, and with a handle of desert ironwood. Desert ironwood is a very durable hardwood that, due to its high density, can be a little difficult to process and also sinks in water. The GPdi is a traditional, slightly old fashioned pocket knife but if you look at it closely you will find nothing but modern materials and hi tech