The DEWALT EXTREME T Shank Metal Cutting Blades deliver superior surface finish & precision with long cutting life. The blade is 50% stronger reducing blade breakage and wandering with a reinforced tooth design for greater precision and longer blade life. The bi-metal construction provides enhanced flexibility and durability. Supplied in a pack of 3. DEWALT DT2150 EXTREME T Shank Metal Cutting Blades for fast cuts in steel up to 3mm thick. Also for aluminium, copper, brass and other soft metals to 3mm thick.