From time to time, I change out the barrels on my personal pens. I think this is one of my favorite pens I've ever made. I'm pretty critical of my own work, but I cannot find one flaw in this pen,that's rare. The pen is a Dura click EDC, I won't sell them because of the refill extender. The woods are stabilized box elder, burl, and end caps are Ebony. I cut all my Celtic knots at 55° and this one is no different. As you can see the knot has five bands. The bands are vulcanized fiber paper that I get at USA knife maker in 8 x 11 sheets. The blue is a newer color that I've never tried before but I rather like it. Comments and critiques are always welcome.