Bernie is a stainless steel ring with two layers of rollers. The first layer covers the entire ring enabling the unit to roll up and down your hand and fingers easily. The second layer of rollers is slightly larger and covers half the ring allowing them to glide over the other rollers. Bernie is available is in four sizes to meet ranging from small to extra large. Like all of the Fidgetland products, Bernie is discreet and quiet and can be used virtually anywhere.