Tired of struggling to align each diamond and longing for straight lines? Elevate your diamond painting craft with our 6-piece diamond drill calibration tool set an essential accessory for DIY enthusiasts who demand precision and a professional finish! How to use: Gently place the ruler on your desired area of the canvas. Align the guide holes of the ruler with the canvas grid. Carefully place the diamonds in the designated positions on the ruler. After completing the section, gently lift the ruler. During use, avoid pressing the straight ruler too tightly. Please note a word on compatibility: We have designed these rulers to be a fantastic aid for a wide range of diamond painting kits. However, the world of diamond painting is vast, and there can be slight variations in how canvases are printed and the spacing between drill points. While these rulers have changed the game for many, they may not be suitable for every kit on the market.