Thanks for the comments guys.
The wood in the top knife is called Palo Stanto its very nice stuff hard and a bit oily same family as lignum Viti I came across a block of it by accident browsing in a wood suppliers and its turned out very popular.
The hollow pins I use quite often in my work , sometimes i fill them with resin for a nice look , but on working knives I like to leave them, possible uses - the one nearer the blade can be used to secure the knife into a sheath with use of a peg.
top hole used for a standard lanyard , both holes together can have cord threaded through pulled against the hand and secured using the thumb during heavy use.
The grind is one of my own ( I think ) its a flat grind starting at the ricasso going into a convex grind right near the tip for more strength both knifes have this feature , the lower knife just has a higher grind.
The flared pommel was mainly a request by the guy who commissioned the first one , I wasn't to sure about it myself , but it is very comfortable to use and follows the shape of the hand. The brass pommel was required to use for crushing seeds nuts or knocking in pegs , the original had a Titanium pommel
The steel in both knives is 01 tool steel,,, no file work or fancy bits on these . I just built a light box to get better pictures still working it out so there might be some weird reflections or shadows which might give this impression .
Hope i have answered all the questions if you want to know anything else don't hesitate to ask