A good, ergonomic mouse is of the essence, as it is a widely used computer accessory. One of the vertical mice in our assortment is the Grip Mouse. You hold a vertical mouse in a handshake position, which has less lateral wrist-bending and forearm rotation. If you use a mouse that does not fit your hands and wrists,... it can lead to pain and discomfort in the shoulders, forearms and hands. With a vertical mouse you prevent many of these problems. The Grip Mouse is for users with small hands.