CV3 described very accuratly, its a different style of grip ,some say it gives better propulsion .Its oftern made from buffalo horn, rams horn , and wood natural fork in a branch looks good,
People who use them say its the most comfortable hiking pole to use ,they can be as fancy and decorative as you want ,but its important to get the hieght of it right to suit you. It should be about the hieght of you arm when held at a right angle mayby a fraction higher.
They very popular here ,mostly used by the upper class when walking such as prince charles .
but also used in place of market sticks.
What is the thumb sticks use.Is it just a different grip or does the style have a purpose?I'm still learning,Thanks for your time.