I made this one out of Manzanita Burl cast in green resin, which barely comes through in the the 'eyes' of the the burl wood. I really like the shape of this pen. I wasn't sure about the double twist mechanism after reading about the possibility of marking up pockets (turning too far to retract and then it advances a little). After assembling, I noticed that unless the refill was fully engaged, the refill would slowly retract on its own. Not sure if this is a new adjustment they made but it works very well and I'm confident that it won't cause an issue.