Replaceable sprocket nose (RSN) tips fit all Oregon Power Match bars, Husqvarna branded Power Match bars and Cannon Superbars. The break away design protects the expensive bar body during mishaps. Extra-long shape directs wear onto the nose, away from the body. Nose is easily removed by punching or drilling out the large rivet. New heavy duty nose design now comes with 6 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.