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), #520121-30, (D) diameter: 20 (500mm), teeth: 120, (D) bore: 30mm, tooth grind: TCG, kerf (B): .174 (4.4mm), pinholes: 2/7/42, 2/9/46 & 2/10/60, plate (C): .152 (3.9mm), 520121-30 carbide Tipped aluminum and non-ferrous metals 20 inch dia X 120T TCG, -6 deg, 30mm bore