Holds up to 50 times longer than a bi-metal hole saw in tough materials. Outstanding lifespan thanks to Bosch Carbide Technology. Designed for use with Bosch's Power Change Plus quick-change adapter: for precision and durability. Ideal for cutting clean holes up to 5 mm deep, for example, for laying wires and for fresh and wastewater pipes, as well as for holes for sockets, light switches, and junction boxes. The first choice for metalworkers: durable and precise. Cutting holes in sheet metal is unmatched by other hole saw applications. In industrial environments or when working on vehicles, extreme precision is essential. However, the material is often very tough and destroys conventional bi-metal hole saws. The Expert Sheet Metal solves all these problems, 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 lifespan and the ability to cut the hardest steel types – thanks to carbide teeth that are individually sharpened and soldered to 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.