Proweld D/B Welder
This is the best-cautery pen available. Perfect for burning away imperfections. But also very useful to melt a bit off fibers of your baitfish and glue 3D eyes into the resulting hole. The great advantage of this pen is that if unfortunately the fire area should ever fail, you can order the individual element. They are in stock at our supplier. Besides this, unlike most, this one uses batteries that you can refresh yourself.
Note: never use two new batteries! The element could be overheated and that can cause damage to it. So use a half-full and a new one!