Using these Katrinkles pattern placeholder tools is a breeze. Just grab the tool and place it where you need to mark the pattern on your project. When handling, be gentle to avoid any damage to the hand - finished surface. To keep these tools in great shape, store them in a dry place away from direct sunlight. Wipe them down with a soft cloth every once in a while to maintain their luster. And that's all you need to know to make the most of these wonderful tools!