Antex soldering bits for xs and xsl soldering irons antex b0052h8 replacement bit 47mm 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 b0052h8 52 47mm soldering bit for xs 25w iron