Westminster Tool Inc. Westminster Tool Inc. invested in updating, replacing and expanding equipment to keep up with demand from its customers, who came under increased pressure last year to meet new needs related to the pandemic. PLAINFIELD, Conn.—Westminster Tool Inc. has invested in new technology to meet demand for high-precision molds from medical customers following a growth spurt that started a few years ago and accelerated during the pandemic. The investment represents more than 10 percent of 2020 sales, according to company officials, who say machining capacity was doubled and automation added. Founded in 1997, the mold maker is experiencing unprecedented growth from medical device manufacturers that need complex molds. The company helps injection molders with initial part design, simulations, mold sampling and part quality.