Lasts up to 50x longer than Bosch 2608580408 Hole Saw in tough materials - Cutting holes in sheets of steel is not like other hole saw applications. In industrial settings, or when working on vehicles, you have to be extremely precise – but at the same time the material is hard and destroys traditional BiMetal hole saws. The EXPERT Sheet Metal solves all these issues in one compact piece of high quality engineering. The EXPERT Sheet Metal is made from a single cylinder of turned metal for ultimate stability, robustness and accuracy. Extreme durability and the ability to cut the hardest grades of steel comes from its carbide teeth, which are individually sharpened and brazed onto the body. This hole saw packs all the best qualities into its short stature: it is long lasting, accurate, and optimised for quality sheet metal work. For use with the Bosch Power Change Plus keyless arbor: offering accuracy and robustness