Digital Spot Welder is able to connect two metal pieces together by joining them at a place in a strong joint. In this welder, the electrodes exert adequate pressure to hold the two pieces together. Connected to an ultrasonic inverter, it can work ultrasonically and provide the best form of welding. The energy in the form of sound that is released while working do get wasted, it instead passed through the surface of the metals to the joint place and makes it more strong. The molecular bonds created at the place of fusion, are permanent and can not easily get detached.