This report contains the experience, training and knowledge gained throughout the internship program that where completed in the company DGP moulds. The report mainly concentrates on CNC machining and the case study done on performance of milling tool. Apart from this the report starts my explaining the basic knowledge obtained on mould production and about mould tool that produces plastic product output. The main value of this report lies on the case study explored in tool wear which shows the better result on performance of milling tool which helps in improving the mould products in even better way to success.