Long Life soldering tips are recommended for those who solder numerous connections. Soldering time is approximately 20% longer than with standard tips. Isolated ceramic replacement tips match any job and easily snap in and out of all Iso-Tip rechargeable soldering irons including the EZ Change, Quick Charge, 60 Pro Charge and Power Pro models. Long Life tips are iron-nickel-chrome plated to withstand long periods of soldering time. These processes provide maximum life for extended usages. Long Life soldering tips have a copper shell that's iron plated to resist erosion, chrome plated to resist corrosion and tinned to provide efficient heat transfer.