Glotrove Electric Diamond Painting Pen, Diamond Art Pens No Wax Needed, Accessories Tool Vacuum Drill Pen with Adjustable Suction Levels for Setting Stones. Manufacturer: Glotrove. Adjustable Suction Levels & Comfortable Grip – With low/high suction settings, this vacuum diamond pen works perfectly with diamonds of different sizes, whether they are S, M, L, or square.