What tool is essential for rolling traupalin patches to get the required pattern?

The essential tool for rolling traupalin patches to achieve the required pattern is a pattern wheel. This tool allows the user to create an even and consistent pattern while applying pressure to the patches, ensuring they adhere properly and the design is uniform. The pattern wheel is specifically designed to press the material uniformly, preventing air pockets and ensuring a strong bond.

Using a cutter wouldn't help in this context, as its purpose is primarily to cut materials rather than apply patterns. A heat gun is utilized for different tasks, such as softening materials for easier manipulation or strengthening bonds once the patches are in place, but it doesn't assist in creating patterns directly. A wrench, on the other hand, is typically used for mechanical fastening and is not relevant to the task of applying traupalin patches. Therefore, the pattern wheel is clearly the most suitable and essential tool for this specific application.