Kone- ja Siltarakennus Oy ("Kone ja Silta"; Swedish: Maskin- och Brobyggnads Ab; "Maskin o. Bro") is a Finnish former engineering company based in Sörnäinen, Helsinki. The 1892 founded company grew heavily in the 1920s and 1930s by acquiring Finnish engineering companies; the products were ships, steel bridges, weighing scales, separators and other machinery. The company's separators were produced under brands Lacta and Milka and they were also produced in Sweden, Denmark and France. By the early 1930s Kone ja Silta held virtually the whole Finnish shipbuilding industry.