Saber's main transformation driver, Seiken Swordriver. Saber's transformation trinket, Wonder RideBooks. I love the creative design that BANDAI and TOEI did, a sword sheath turns into a driver and book trinket based on fairy tale story.

Here's a two known Wonder RideBooks:
-Peter Fantasista, a Wonder RideBook that is based on Peter Pan.

-Hiden's Secret Stories, a Wonder Ride Book that is based on Kamen Rider Zero-One.