The Pommel is an attachment to fit to the back of another toy and hold a bullet vibrator. Because silicone transfers vibration well, it can vibe up a whole dildo just through the suction cup! the Pommel is also designed for pelvic harnesses with a low mount point, to slide under the vulva.
Works well with the Blade, Swell, Swing, Breach, or with the Swat wrapped around or pressed against whatever bits you've got. Don't forget to get a bullet vibe if you don't have one!