Have this original pin fitted to my Ultegra 11-speed. FD. It's SO TINY (2-3mm), it's VERY fiddly - so have a newspaper/or plain mat underneath, to catch it, for when/if you drop it! Despite what Shimano instructions say, I find I still have to first loosen the cable bolt in order to remove (or turn) the converter, (with a 2mm allen key.) 'No problem', as i was renewing the old FD cable anyway. Hope this new converter pin lasts longer than a couple of years.. PS. It's worth buying 2 - and keep 1 as a spare (same P&P cost.)