Use for repairing cracks on rooftops, floors, walls, ceilings, and other joints. Excellent sharpness and groove shape will not shift until the end. Low vibration, reduces rattling sound without fatigue. Less caulking. Package Size: Length: 7.7 inches (195 mm), Width: 5.3 inches (135 mm), Height: 0.5 inches (12 mm); Package Weight: 7.9 oz (220 g); Country of Origin: Japan; Uses: For dry cutting, repairing cracks, concrete, mortar, etc., Lower groove for pouring caulking - Outer diameter: 3.3 inches (85 mm); Thickness: 0 mm)