Specialized thin kerf tungsten carbide tipped blades - these blades have a 1.5mm thick kerf (cutting width) and 1mm thick blade body so are specialized for use with a cordless saw. This 165mm circular saw blade has 24 teeth and a 20mm bore so will fit any saw that has a 20mm bore. This circular blade also comes with a 16mm reduction ring so these blades will also fit any circular saw that has a 16mm bore.