516121. Carbide Tipped Aluminum and Non-Ferrous Metals 16 Inch Dia x 120T TCG, -6 Deg, 1 Inch Bore. Thanks to its special carbide formulation and blade geometry, this is the ideal blade for cutting relatively thin-walled aluminum and non-ferrous extrusions and frames. The negative hook angle (-6°), triple-chip grind and thick plate combine to produce a superior finish. The blade can also be used to cut other “difficult” materials such as plastic, PVC tubing, fiberglass and ACM (Aluminum Composite Material).