Tct (Tungsten Carbide Tipped) Construction: Extremely Durable And Resistant To Wear - 20Mm Diameter: Suitable For Drilling Holes Of Specific Sizes - Carbide Tips: Retain Sharpness And Provide Clean Cuts - Applicable Materials: Ideal For Drilling In Metal, Wood, Plastic, And Other Materials - Metalworking: Drilling Precise Holes In Metal Pipes, Sheets, Or Plates - Woodworking: Creating Holes For Pipes, Fittings, Or Other Applications