Bosch OSC312RF-10 3-1/2-Inch by 1/8-Inch Carbide Grit/Grout and Tile Oscillating Blade, 10-Pack High Quality Accessory Manufactured in Switzerland Laser Etched Depth Guide - for accurate capacity measurements Multiple Position Settings - for optimal versatility (30 Degree increments) Edges are coated with high-quality tungsten carbide grit to remove grout and mortar in large spaces OIS 12-pin system for high-torque, heavy duty applications