If there is one tool that you'll certainly need as you progress in your lock picking journey is a decent file - for impressioning, finishing tools you've made etc. Our Glardon Vallorbe Swiss No4 cut file is that tool. Prized by lock pickers around the world for the fine finish it leaves on the key, picks, etc. Perfect for impressioning, and all sorts of other lock picking requirements.
A set of needle files is an essential. As soon as you start to develop your lock picking techniques a set of decent needle files are without equal. If you want to make a bump key, make a lock pick, a tension tool, whatever - even if you want to modify tools you already own, you will at some point need a set of needle files. We looked a lots of sets before settling on this high quality set with all the right shapes for your lock picking progress.