Stainless steel has the property of not rusting. However, if tools out of conventional steel are used for stainless steel components or screws, the wear particles from these tools can adhere to the surface and rust. This effect known as extraneous rust can impair the visual appearance and even cause structural damage that may result in high costs for the repair work.The wear particles that cause this rust effect can be prevented by using stainless steel tools. The stainless steel tools from Wera are vacuum ice-hardened and have the hardness and strength needed for workshop applications.