Antex soldering bits for xs and xsl soldering irons antex b0055h8 replacement bit 05mm 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 b0055h8 55 05mm soldering bit for xs iron