Tired of painstakingly adjusting each diamond, hoping for straight lines? Elevate your diamond painting craft with our 6-Piece Diamond Drill Calibration Tool Set – the essential accessory for DIY enthusiasts who demand precision and a professional finish! How to Use: Gently place the ruler over the desired section of your canvas. Align the ruler's guide holes with your canvas grid. Carefully place your diamonds through the ruler's designated spaces. Once the section is complete, gently lift the ruler. Avoid pressing down too hard on the ruler during application. Please Note - A Word on Compatibility: We've 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 are a game-changer for many, they may not be a perfect fit for every single kit on the market.