William Lee produces parts for just about every truck manufacturer; Scania, Volvo, Daimler etc.  Parts ranging from exhaust manifolds, exhaust pipes, chassis brackets, spring brackets, bearing caps etc.  Today 70% of production on the site is for commercial trucks; that is 20,000 tonnes p.a. of iron castings on trucks moving goods around the World.  Automotive parts include suspension, steering, and braking components for some high end passenger cars such as Bentley and JLR, along with braking parts for companies such as Alcon and turbo charger housings for Borg Warner.

William Lee also has a long association with Pandrol of Worksop and has been supplying railway line components for decades.  In recent times most of these products have been supplied by low cost based countries in Asia, but William Lee is sometimes able to compete based on low lead times.

The material grades made by the company has grown, particularly in the petrol and diesel engine exhaust gas emissions control, where temperatures are up to 1,000 degC.  For these produces special grade SG known as SiMo and D5S Ni Resist has to be used.  This is one of the markets where William Lee has a strong reputation for truck engine components.