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Three Rivers Manufacturing, marketed under the TRM Knives brand, produces precision folding knives in Palmer, Massachusetts, building on a history of titanium parts manufacturing that predates the knife line by nearly two decades. The company was founded in 1997 by Les and Marianne Halpern as Custom Knife Supply, which grew into Halpern Titanium, a precision parts manufacturer supplying millions of titanium components to major knife brands as an OEM contractor. In 2014, the Halperns launched TRM as their own knife brand, applying their machining background to a line of everyday carry folding knives assembled by hand in the Massachusetts shop using American-sourced materials and suppliers. The knife line includes the Atom, Neutron, Bulldog, Javelin, and related models, all carrying an engraved USA mark.
