I've been doing some testing and these are the best washout cloth markers I've found. I can sharpen them without the "lead" breaking every half turn, they mark a line I can see, they stay on long just long enough to do something with the line, and they wash out with soap and water. Perfect. You may have to remark as you go if your project is handled a lot. They come in Red, White, and Blue. Functional AND patriotic. You'll get one of each color. They're nice and fat to protect the "lead" so you'll need a pencil sharpener with a large opening. Luckily, I've been testing pencil sharpeners too. We are currently out of stock on these markers. We will be ordering more of them. At that time, the "Buy" button will be available.