ST4-X Heavy is a double - ended sculpting tool. One end is flat, and the other is round. It's crafted with a heavy bass string. When using it on your sculpture, apply a criss - cross pattern to achieve a super smooth and even surface. Remember, this isn't a digging tool. Using it for digging can cut short its lifespan. It makes surface smoothing a breeze. For even better results, use it after the ST5: Rake. The ST7: Rake is also a double - ended tool. It's great for quickly smoothing large surfaces and refining them. Just use a criss - cross pattern on the surface for optimal results.

Here's how to use these sculpting tools. For the ST4 - X Heavy, hold it and run it across your sculpture in a criss - cross pattern. This will help you get an even surface easily. But don't use it for digging as it can damage the tool and reduce its life. It works best after using the ST5: Rake. As for the ST7: Rake, use it in a criss - cross motion to smooth and refine large areas of your sculpture. After each use, clean the tools gently with a soft cloth to keep them in good condition. Store them in a dry place to prevent rust and damage.