Strong, Durable, Colorfast, and Recyclable. The Large Storage Box Can Be Used for a Long Time Without Staining Other Areas. Special Design with Automatic Feeding Functionality - Simple, Efficient, Safe, and Reliable. Pen Washer with a Strong Spiral Blade. The Rotating Blade Has an Alloy Structure for Better Durability. Pen Washer is Super Easy to Use - Simply Insert the Pen into the Holder and Move It Clockwise While Holding the Washer. The Pen Begins Moving Inside the Washer with Each Motion; When Resistance Decreases, Move It Counterclockwise and the Pen Will Exit Automatically! Do Not Wash Further When the Pen Is Empty to Avoid Damaging Your Pens. Manual Operation Is Simple for Schoolchildren to Use. Ideal for Schools, Home, and Office - Quiet and Reliable with Minimal Disturbance. Suitable for Various Locations Such as School, Home, Library, Studio, and Outdoor. Can Be Easily Used for Students, Always, Painters, Designers, and Children.