Antex soldering bits for xs and xsl soldering irons antex b0051h8 replacement bit 3mm tip specifically designed to match the power output of the heating element antex replacement bits are manufactured from high grade copper plated first with iron and then chrome to give a long working life antex 50 series for use with antex xs 25w soldering irons antex b0051h8 51 3mm soldering bit to suit xs 25w iron