Jigs And Fixtures A fixture differs from a jig in that when a fixture is used,  the tool must move relative to the workpiece;  a jig moves the piece while the tool remains stationary. A jig's primary purpose is to provide repeatability, accuracy, and interchangeability in the manufacturing of products.  Absolute accuracy and repeatable tolerances are crucial We produce custom solutions or work from your existing drawings. Powergrade’s expert designers understand the  importance of tooling,  jigs and fixtures in   manufacturing and offer bespoke solutions to  our clients.