Eagle Square Manufacturing Co., one of Vermont’s oldest industries as well as Shaftsbury’s largest and longest operating company, was incorporated in 1858; home of the carpenter’s square invented by Silas Hawes in 1819, he and Stephen Whipple formed the company. The Stanley works bought it in 1916, built a new plant in 1971, then ceased production in 2001. The building is now owned by Bernstein Displays.