This paper explains the basics of what a universal shape adapting jig is, how it works and its application. The clamping of the workpiece with the various shapes can be done using this universal shape adapting jig. Testing is done using the clamping test with an appropriate clamping force using air pressure. In CNC milling industries, a lot of jigs had to be produced for parts that could not be properly clamped by conventional milling jigs. Making a universal jig for CNC milling that can adapt to any form is a challenge. This paper evaluates the design of the jig that can adapt to various shapes for CNC milling by using pneumatic cylinders as their clamping tools. The steps involved in implementing this project are conceptual design, detailed CAD design, fabrication and testing. FEA analysis is also conducted to find out the location of the highest stress and deformation that occurs in the design.