WELDING THICKNESS20 20mm Welding tips are constructed from steel to get the weld, It's easily to weld together metal materials with an applied spot welding thickness of 2.0 +2.0mm. DISTINCT CONTROL PANEL- With an distinct panel, you will be able to operate without troubles. There are couples of modes for your option, easy and simple to use. REPLACEABLE WELDING TIPS- Spot welder comes with extra pair of welding tips for multiple uses. Simply twist the tips off when they are ready to be replaced and screw on the new one. COMPACT SIZE- It is large enough to perform welding operations, and also compact to store when not in use; does not take up much places. HANGING STRAP- There is a hanging strap in the list,too. You can hang it around your neck whenever you want to use or carry the machine so you don't have to holding it all the time.