Bosch Multi Tool Blade OSL234HG 2 3 4 Inch Starlock Hybrid Grout Cutter Carbide Grit Tile Thinset Mortar Removal Oscillating Saw Razor Accessory Spade Hardwood Contour Handle Blade Surface Hardwood Contour Handle Blade Surface Finish Hand Polished Surface Country of Origin USA Pro Tip: Use a straight edge chalk line or wooden guide board across the slab when cutting control joints to ensure long expansion grooves remain perfectly straight the set features a 15 degree open end angle to maximize arc swing in restricted areas alongside a 13 degree box end offset that supplies critical knuckle clearance Starlock 3D Interface Connection: Specialized three dimensional contact seat maximizes direct torque transmission parameters while filtering out hand arm vibration loops Hybrid Teardrop Layout Frame: Dual action configuration provides a long rounded edge for flat linear grinding and a micro pointed nose tip for precision detailed finishing work