Diamond Knurl Convertible Pen Kit - Chrome Rotacrylic Pen Blanks Any "wonkiness" in the tube

Any "wonkiness" in the tube that you may see in the photo is due to this optical effect

including:

It is also stunning when used in segmentation work

and black dyed Basswood

Oddly enough

Diamond Knurl Convertible Pen Kit - Chrome Rotacrylic Pen Blanks Any "wonkiness" in the tubeDiamond Knurl Convertible Pen Kit Chrome Craft the most universally appealing pen in your lineup with the the Diamond Knurl Convertible Pen Kit in Chrome. This Jr sized pen features the beloved decorative knurled center band in a bright, durable Chrome finish and it ships with both a rollerball and a fountain pen section included, so every pen you turn is immediately ready for either writing style. A Schmidt 888 fine rollerball refill is included. No