Faithfull FAIZ1804030 TCT Circular Saw Blade 180 mm x 30 mm Core x 40 Teeth All the blades in this range fit most popular makes of power machines. These blades are of a professional quality and the 7 mm tungsten carbide tipped teeth ensure a long working life and accuracy of cut. Each blade has laser cut expansion slots to improve their performance by reducing heat build up, and many sizes are available with different tooth counts that allow the user to select the correct blade for the job in hand.