The Faithfull professional quality circular saw blades with 7mm Tungsten Carbide Tipped teeth to 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. A positive rake blade (POS) is advisable when the workpiece is taken to the saw blade. A negative rake blade (NEG) is advisable when the blade is taken to the workpiece. Diameter: 140 mm.Bore: 20 mm.Teeth: 16T.Comes with 16 and 13 mm bushes.