Ernie Els Rockroller The Rockroller gives instant feedback on how a perfect putting stroke should feel. Simply adjust the arm width and height and start rocking. Use the Rockroller at the golf course, at home, or in the office. My putting statistics went from 124th to 5th on the PGA Tour with the Rockroller." If you have any questions about this product or would like to order by phone, please call us Toll Free at 888-733-8383. We look forward to hearing from you!