Circular Saw Blades | Cutting & Blades | Screwfix- 6.5 inch circular saw blade ,Evolution Circular Saw Blade 185 x 20mm 20T (31656) Product rating. 4.6. out of 5 stars. (79) Compare. Compare. General Purpose. Cutting Width (Kerf): 1.7mm.Circular Saw Blades | McMaster-CarrCircular Saw Blades for Aluminum. Teeth are carbide tipped and designed to push chips away from the blade to prevent clogging and produce smooth cuts in aluminum sheets, tubing, and T-slotted framing.