Package Size: Length: 7.7 inches (195 mm), Width: 5.3 inches (135 mm), Height: 0.2 inches (6 mm); Package Weight: 4.1 oz (128 g); Country of Origin: Japan; Uses: For dry cutting, concrete, blocks, brick, slate, etc.; Outer Diameter: 4.1 inches (105 mm); Thickness: 0.0 inches (2 mm); Inner Diameter: 0 inches (2 mm); Electric Tools: Concrete Material: Blocks / bricks Slate, etc. Maximum rotation speed: 14,500 min-1