Diablo's, 2-3/4", Universal Fit Carbide Grit Oscillating Blades Feature Application Specific Designs That Deliver Maximum Durability And Longer Life In Grout Removal Applications. An Optimized Blade Design Delivers Fast Material Removal In Hard To Reach Areas. The Blade's Universal Fit, Adapter-Free Design Easily Attaches To Most Tools Except For Starlock.