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DIAGER is a european leading manufacturer of professional drill bits for concrete.

• Manufacturing

60 years of experience and constant investments has enabled Diager to develop its expertise. Diager is one of the leading European manufacturer of masonry drill bits, with more than 20 million tools yearly manufactured. Diager is a french independant manufacturer. This privilege enables the company to remain autonomous in all areas from design through to industrial production. Our production is located in France. Constant investment in our production tools and our highly qualified employees means that we can produce high quality and high performance drill bits.

As a specialist for rotating tools, Kaestner Tools is dedicated to providing high performance tools with high precision, reliability and competitiveness.
In 1990, Bianka and Jürgen Kästner founded this successful family business in Steinbach-Hallenberg as Kästner Präzisionswerkzeuge. In 2018, Kästner became part of the globally acting SIMTEK Group, which is focused on providing highly specialized cutting tools, under the new name Kaestner-Tools GmbH.
The range of tools of both specialists, SIMTEK and Kaestner, are a perfect match to each other.
With over 30 years of experience the team at Kaestner focuses on the specific needs of its customers and provides efficient and reliable solutions far beyond the limitations of standard items.