The Fender Fat '50s Strat Pickup Set gives you calibrated pickups constructed with hand-beveled, staggered Alnico V magnets and Formvar magnet wire. '50s Strat Pickups deliver enhanced bass response without the harsh midrange. The middle pickup is reverse wound/reverse polarity for hum canceling in positions 2 and 4. These are OEM on Custom Shop Fender Showmaster series Stratocaster guitars.