THESE ARE THE EASY FIT TYPE, LONGER THAN THE STANDARD TRUNNIONS, & WITH A SHOULDER THAT ALLOWS THEM TO SIT ON TOP OF THE SELECTOR & CLUTCH ARMS, THE FLATS ON THE SHOULDER ALLOW THE USE OF A 10mm SPANNER TO HOLD THE TRUNNION IN PLACE WHILST TIGHTNING THE ALLAN SCREW WITH A 4mm KEY.
eBay