Product Description: Versa Tool MB5J 80mm HSS Semi-Circular Multi-Tool Saw Single Blades, 9mm Offset Mount , Fein Multimaster, Dremel, Bosch, Craftsman, Ridgid Oscillating Tools - 5/Pack. Made from high speed steel, the 80mm wood and metal cutting blade is ideal for making precise cuts in nail embedded wood, drywall and plaster material. Applications include cutting openings in flooring for venting, repairing damaged flooring and cutting openings for electrical boxes. The blade can also be used , cutting metal materials such as copper, tin, aluminum and nails. Specifications: Material: High Speed Steel. Application: Metal, Wood. TPI (Teeth Per Inch): 17. Speed (OPM): 25000.