One of my friends was with NTTF as a Training officer for 4.5 years. During the training, he enhanced his core strength in tool engineering, shop floor basics, design processes, hydraulics pneumatics, and even robotics engineering.
According to him, the best part of the training was that he got to clear his theoretical knowledge and apply them practically during his training. If your basics are clear and you can express them properly then you will certainly get decent opportunities at the institute.
Currently, he is working with Jindal Steel in a new role. His training from NTTF has helped him prepared for the new challenges that come with the job.