Sargent and Greenleaf
Sargent and Greenleaf, more commonly known among Safe and Vault technician circles as S&G, is a U.S. company that manufactures combination locks, key-operated safe and safe deposit box locks, high security military padlocks, and associated equipment. James Sargent founded the James Sargent Lock Company in 1857. In 1864, he moved to Rochester, New York and the company was renamed Sargent and Greenleaf. The company is currently headquartered in Nicholasville, Kentucky. It is a subsidiary of Stanley Security Solutions.