(KTLA) A Southern California man said he is proud to learn that his unbreakable glass product recently foiled a group of smash-and-grab robbers from ransacking a Sherman Oaks, California, jewelry store.

On Sept. 3,  the suspects ran into Kristof’s Jewelers at Westfield Fashion Square mall while carrying large hammers. 

They began smashing the glass display cases as the loud sounds sent panicked shoppers running to safety. After several attempts to shatter the glass, they weren’t making any progress, so they fled the scene.

The store’s owner said that while their display cases received some damage, no jewelry or merchandise was taken.

Ray Tissan, owner of RT Unbreakable Glass, said he was inspired to market the polycarbonate unbreakable glass product after being the victim of burglaries as a business owner himself.

“There were a lot of break-ins back then, at liquor stores and small shops, especially,” he told local affiliate KTLA.

Although the polycarbonate material has been around for some time, Tissan said that by customizing the sheets to fit a customer’s needs, he could provide a product that would work with many types of stores and industries.

After advertising his product on social media, Tissan said he began to receive an influx of calls and orders.

The unbreakable material is now seeing an increase in stores across Southern California, with many owners opting to install the pieces on their doors, windows and even walls and ceilings.

Tissan said he’s very proud that his product has helped protect people’s businesses, especially as a rise in retail theft continues across the Southland.

“It makes me feel so good,” Tissan said of the response he’s received.