Discover this set of circular saw blades designed for a variety of tasks. Crafted from high - speed steel, they are built to last and can operate at a maximum RPM of 20000, allowing for precise and rapid cutting. The 1/8" shank mandrels fit most power die grinders, rotary tools, and air tools. Blade diameters range from 22 mm to 44 mm, with a 6.35 mm hole and 3.175 mm connecting rod. This set is perfect for working on wood, plastics, aluminium, and soft metals, making it a great choice for carpentry, flooring, and hobby projects. The package comes with 10 circular saw blades and 2 extension rods, totaling 12 pieces. When using, insert the mandrel fully and tighten the rod screw, ensuring the hole size is smaller than the screw. These saw blades will bring convenience to your DIY and professional projects.