Handy Stud Welder(XS-3000): 1.The speed of welding is fast ans welding one screw bolt in 1s screw diameter 3-12mm 2.The handy welder is small and convenient to use applicable: carton steel,stainess steel.aluminum.brass.stud welding .meson modelXS1500XS2300XS3000XS4500range of weldingm3-m6m3-m8m3-m10m6-m12diameter of welding3-8mm3-10mm3-12mm6-14mmmaterial of weldingcartbon steel,stainess steel,aluminum,brassfrequecy of welding4 to 20weld in interval1-3mscapacitance66.000uF99.000uF132.000uF198.000uFwelding heat input1500J2300J3000J4500Jcharging voltage60-200Vpower220V/50/60Hz/10Asize(mm)250*150*260300*180*260650*200*260690*220*260weight(kg)16.517.52123 Your inquiry and question are welcome!