Yes, very strong. All of our Fancy Glass and Mirrors branded glass furniture are produced using toughened glass (unless otherwise stated), sometimes known as ‘tempered’. Many of Fiam and Sovet products which use flat glass are also toughened to the same regulations. Please note that due to the nature of curved/formed glass and the way in which it is produced it is not normally possible to toughened this glass. For this reason fancyglassandmirrors.com only sells the very best glass furniture brands produced by highly specialist designers and manufacturers. These products have been highly tested to ensure they are safe for your home or office.