The Trump administration has quietly expanded its 50% steel and aluminum tariffs to include more than 400 additional product categories, vastly increasing the reach and impact of this arm of its trade agenda.

The new tariffs, which took effect Monday, expand the scope of the levies that President Donald Trump previously announced on the valuable commodities. The tariff list now covers products like fire extinguishers, machinery, construction materials and specialty chemicals that either contain, or are contained in, aluminum or steel.

“Auto parts, chemicals, plastics, furniture components—basically, if it’s shiny, metallic, or remotely related to steel or aluminum, it’s probably on the list,” Brian Baldwin, vice president of customs at Kuehne + Nagel International AG wrote on LinkedIn of the expanded list.

“This isn’t just another tariff—it’s a strategic shift in how steel and aluminum derivatives are regulated,” he continued.

The levies extend to 407 new product categories, the Department of Commerce said Tuesday.