The Roller II Joystick with interchangeable handles. $295.00.

‘Penny and Giles’ Roller II line are sturdy three button switch adaptable pointing devices. They come in either a large 2.5″ trackball or a 3″ joystick. They have seperate [sic] buttons for left click, right click and drag lock with color corresponding switch ports on the back of the units. A flashing light indicates the drag button has been activated.’