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Certificates

ISO Certification

DIN EN ISO 9001:2015

Heinrich Strenger
GmbH & Co. KG
Velbert, Germany

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Product catalogue

Bold & metal construction

Product catalogue Strenger

Version: 2017, DE

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Glass door fittings

Product catalogues Strenger

Version: 2017, DE

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Toggle latches and handles

Product catalogue Strenger

Version: 2017, DE

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Cylinder quarter turns

Product catalogue Strenger 

Version: 2017, DE

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