(Sarah Read is an author, editor, yarn artist, and pen/paper/ink addict. You can find more about her at her website and on Twitter.)

Fineliners are usually fairly standard in build and purpose, but every now and then, one with a unique feature comes along. The Stabilo Sensor boasts a cushioned felt tip that retracts into the metal casing. It's not a feature I've encountered on other fineliners I've tried. I can't decide if I like it or not, but I do think it has its uses.