The machine mounting part is a screw type. The unique 3-section blade shape greatly increases durability. The center pin type allows for accurate positioning and smooth cutting discharge. Can be drilled with a large aperture using a small horsepower machine. Blade diameter: 0.9 inches (23.5 mm); Maximum processing plate thickness: 1.4 inches (35 mm); Weight: 3.2 oz (94.1 g); Compatible motors: magnetic drilling, upright drilling, radial drilling, lathe, milling machine, etc.; Compatible electric motors: magnetic drilling, upright drilling machines, [Materials] Blade: Super Hard Chip; Uses: Material for machining: steel, steel plate, stainless steel, cast iron etc. Compatible with steel materials for welding construction (SM material). Compatible with construction steel (SN material) Cutting material: For drilling holes in steel plates, shaped steel, stainless steel plates, cast iron, etc. up to 1.4 inches (35 mm) thick.