leadcore brands in Tackle and Techniques Posted yesterday at 06:32 PM Tuf-Line does offer two types of lead core. One is Tuf-Line Lead Core which has a polyester sheath which I would put in the traditional lead core category where a Willis will work fine. The other choice which this topic relates to is the Tuf-Line Micro Lead with a Spectra sheath and is advertised as 30% thinner and stronger. Allows for use on smaller reels and is supposed to have similar sink rate by being smaller diameter. That thinner diameter makes it harder to do the Willis for me. I use the Micro Lead on Saltist 50’s with 10 colors and have been happy with it. I use back to back uni knots to tie it. For shorter cores I use Stealth Core and use the Willis. To me the Micro Lead has an advantage in a longer lengths- not so much especially 5 colors or less. I have no interest in any lead core company by the way.