Blade Length: 2-3/4"Starlock Interface For Professional Performance , Also Works With OIS Compatible Tools Including Bosch, Fein, Milwaukee, Makita, Rigid And MorePremium Carbide Grit Coating For Long Life In Grout And Tile ApplicationsHybrid Teardrop Design For Use In Both Grinding And RaspingColor Coded Interface And Laser Etched Blade To Quickly Identify The Right Blade