NEW YORK — General Tools & Instruments, the U.S. hand tools and hand-held test instruments manufacturer, has been acquired by High Road Capital Partners, a private equity firm based in New York City. General’s CEO and senior management team remain at the company’s helm. The company, which sells to pros, hobbyists, and DIYers, has been headquartered in New York City since 1922, offers more than 1,500 products.