The integrated splinterguard used in the FS-SP 3000/2 guide rail is a critical guide rail system component, and after some time and heavy use, will need to be replaced. Replace your splinterguard as needed to ensure perfect alignment of your guide rail to the cut line, and to protect against tear out, on cuts both with the grain and across. Though you should expect many cuts from your original splinterguard, its life expectancy is heavily dependent on your application. Keep your cuts perfectly splinterfree by periodically replacing your splinterguard, especially if you are switching between blades, or using the guide rail with more than one saw.