The company was known for producing threshing machines, regarded as among the best available. They also made traction engines, steam tractors such as the Foster Wellington and Showman's road locomotives, as well as Steam Wagons. The last showmans engine built by fosters were No. 14632 Success in and No, 14634 Princess Marina a 7 nhp design. During the First World War they built the first tanks for the British Army.