Bosch RCB9G 9" Carbide 30 Grit Edge Reciprocating Saw Blade for Cast Iron Block start sharp, stay sharp, and with Turbo-Teeth technology last up to 3X longer than standard reciprocating saw blades. Designed for extreme cuts for tough construction uses, these blades deliver the best performance for pro cutting applications. The Edge's exclusive Turbo-Teeth design, performance-optimized blade geometry and Swiss-made reliability add up to a line of blades that deliver results.