The ZenPen is an awesome two-part multitool. It just makes your life so easy when dealing with solid concentrates. It's made from stainless steel and has a sharp scraper edge. It will actually produce 2mm thick strings.

It's an affordable accessory that makes handling solids a breeze. It's virtually indestructible, keeps your fingers clean and does the job. Not to mention it's super easy to clean afterward. Awesome!