The Annular Hole Cutter TCT 70 x 30mm Weld Shank 19.05mm is a specialized cutting tool used for drilling larger, precise holes in tough materials, such as metal, steel, and other hard substrates. TCT (Tungsten Carbide-Tipped) refers to the cutting edge material, which is made of tungsten carbide, a highly durable and hard material. TCT ensures that the cutter can withstand the wear and heat associated with cutting through tough materials. 70mm is the diameter of the hole the cutter is designed to create, meaning it will drill holes 70 millimeters wide. 30mm is the cutting depth of the cutter, indicating that it can drill holes up to 30 millimeters deep into the material. Weld Shank refers to the shank type of the cutter, meaning the shank is welded to the cutting tool. This type of shank is often used in industrial applications for increased strength and stability during heavy-duty use. 19.05mm refers to the shank diameter (the size of the hole at the bottom of the cutter), which is 19.05 millimeters (or 3/4 inch). This specific size ensures compatibility with machines that accept this size of cutter. Annular hole cutters are particularly useful for cutting clean, precise holes in metal without the need for a full drill bit. They remove a ring of material from the center, leaving a clean, accurate hole with minimal heat buildup. This cutter is often used in industrial applications, steelworking, and metal fabrication where large, deep holes are needed.