The Weldbrush® 300 is the base model and is especially popular because of its simple operation and price point, at the same time suitable for all jobs. This device can quickly remove the discoloration on welds without any aggressive means and immediately passivate the stainless steel in one movement. All TIG weld seams and heat traces are free of all discoloration within a few seconds without leaving any traces. The machine is also used for marking stainless.