It is a vertical pole fixed in the ground. Generally teak wood or Sesame (a type of rose wood) is commonly used because of its physical properties such as toughness and soft surface. Castor oil is applied to its surface in order to reduce the friction and minimize the injuries. Generally it is 10 to 12 feet high above the ground level. It has got a diameter of 5 to 6 inches at the bottom and 1.5 to 2 inches at the top.