First l want to apologize for my previous review on these mild steel Electrodes ,it was my fault that l did not read what was written on the box came with these electrodes , l ordered the 3,15mm electrodes which requires 125 amps for them to operate well ,so l set my machine to 125 amps and l was able to weld a 1,6mm thickness very well without any hustle which was a nightmare previously ,the arc was pretty steady and the weld came perfect ,but if anyone wants to weld thinner materials with these electrodes l would recommend same brand electrodes but l think 2,0mm or 2,5mm would work great,l had few afrox rods so l managed to do a comparison and these rods were pretty good as the afrox if not more ,l really now love these electrodes all thanks to TSA welding supplies will definitely order another 5kg but 2,5mm of these electrodes ,l wont waste my money buying expensive electrodes anymore all you need is to set the operating amperage depending on their thicknesses and all the operating amperage ranges are written on the box.