Holds up to 50 times longer than a bi-metal hole saw in tough materials. Cutting holes in sheet steel is unlike any other hole saw application. In industrial environments or when working on vehicles, precision is crucial. However, the material is often very tough and destroys conventional bi-metal hole saws. The Expert Sheet Metal addresses all these issues, as it is made from compact, high-quality technology. The Expert Sheet Metal consists of a single cylinder of turned metal for ultimate stability, robustness, and accuracy. It offers extreme longevity and the ability to cut the hardest steel types – thanks to carbide teeth that are individually sharpened and soldered onto the body. This hole saw combines the best features in a compact form: it is durable, precise, and optimized for high-quality sheet metal work. Designed for use with Bosch's Power Change Plus quick-change adapter: for accuracy and robustness.