The Seymour Duncan SVR-1 Vintage Rails use a unique split rail, twin coil design and special wiring to achieve true single coil tone without any hum. The sound is clean, clear and bright, with all that quack you love in the notch positions. Use them as a complete set or with a Seymour Duncan Hot Rails in the bridge for a truly versatile Strat. U.S. Patent No. 5,525,750.