How did James Nasmyth's shaper improve metalworking?

James Nasmyth, a British engineer who trained under Henry Maudslay, significantly advanced metalworking through his invention of the shaper.

This machine tool improved manufacturing precision by allowing a workpiece to be clamped horizontally to a table. A cutter, utilizing a reciprocating motion, could then plane small surfaces, machine straight-line surfaces, or cut keyways with greater accuracy and efficiency. By providing a reliable method for shaping metal components, Nasmyth’s invention contributed to the broader development of machine tools that made mass production and interchangeable parts possible during the 19th century.1