William Cook is a large engineering Company. Manufacture of steel and alloy castings from a few grams to several tonnes. The bulk of William Cook’s products now are sophisticated components, assemblies and systems for a huge range of applications. William Cook prefers to design and manufacture its products in-house. This retains control, and reduces reliance on sub-contractors. To assist this, William Cook has substantial design and R&D resources to support its factories, which themselves include large and modern machine shops and testing establishments.