Product Name: NANIWA Pro Cup Crisscript Model : DO-4010 Dimensions: Outer Diameter 3.9 inches (100 mm) x Thickness 0.1 inches (4.5 mm) x Hole Diameter 0.6 inches (15 mm); Electric Tools: For use with gutter grinders: 3.9 inches (100 mm) Please do not shake it. Please use objects that do not shake the main axis of electric tools. Please cut it lightly and slowly and blend it thoroughly. Do not cut it during cutting. Do not use it diagonally (side pressure on the blade is dangerous). Avoid cutting metal (dull sharpness and shorten the life). Please use it with water to make it safer. Safety with electric tools included. Please be sure to attach the cover to the surface protector. Do not cut curves... Do not use in places where there is a risk of fire or explosion.