The Park Tool CT-6.3 is a compact, folding chain tool designed to work on most chains. This tool is perfect for the home shop or the track all while being extremely portable. The CT-6.3 is smooth, powerful and encased in a stainless steel shell, which becomes a comfortable handle when opened. Includes a peening anvil that allows for peening of Campagnolo 11-speed chains. Peening anvil pivots out of the way when not in use.