Spread the vibration across more skin. The "Wide Field" Glider is a flat disc attachment that screws onto any Pure Frequencies fork — weighted or unweighted — turning a single contact point into a broad field of vibration. Press the disc into the sole of your foot to cover dozens of reflex points at once. Glide it across your calves after a long day. Use it on your forearms, palms, sinuses or lower back wherever a single point isn't enough. Same vibration, same frequency, wider reach across the muscle. Smooth flat contact surface, screws on in 5 seconds with the included allen key. Built to last a lifetime .