The invention relates to a method of making a lifter bar (1a, 1c) for use in a grinding mill (2), to a refurbished lifter bar (1b) and to a mould (3) for producing the refurbished lifter bar (1c). The lifter bar (1a, 1c) has a predetermined form and comprises a base member. The method comprises the steps of providing a mould (3) having an interior space (4a) that conforms at least partially to the predetermined form; joining the mould (3) and the base member together to form a cavity (4b) defined by the base member and the interior space (4a); and filling the cavity (4b) with polymer and allowing the polymer to attach to the base member to construct a lifter bar (1a) having the predetermined form.