The 7-1/4 in. 45T Carbide-Tipped Max Efficiency Saw Blade, Metal/General Purpose is for use with the 40V max XGT Brushless 7-1/4 in. Metal Cutting Saw Kit, with Chip Collector (GSC01M1), the 40V max XGT Brushless 7-1/4 in. Metal Cutting Saw, with Chip Collector (GSC01Z), and the 7-1/4 in. Metal Cutting Saw (4131). The 7-1/4 in. 45T Carbide-Tipped Max Efficiency Saw Blade is engineered with high grade Tungsten Carbide tips for durability and can cut pipe, angle iron, channel, and more. The E-12815 allows for up to 80% faster cutting than standard blades. It is a fully hardened and expertly hand-tensioned steel saw plates for true cuts. The ultra-thin 0.055 in. kerf reduces the load put on the tool.