This is Cannon's replaceable sprocketnose (RSN) tips for Cannon SuperMini Sprocketnose bars. This break away design protects the expensive bar body during mishaps. The nose is easily removed by punching or drilling out the large rivet. New heavy duty nose design comes with 3 rivets to secure the nose sprocket. Kit includes installation instructions along with a rivet. Tip works with all gauges (.050, .058, .063). Requires a hammer and punch to install.