BLACK & DECKERCIRCULAR SAW BLADE Expansion slots prevent warping (for applicable blades)Carbide Performance blade: longer life & smoother cut vs. steel blades Expansion slots prevent warping (for applicable blades)Key Features Carbide Performance Expansion slots Benefits Prevent warping for truer cuts Provides longer life, smoother cut vs. steel blades Technical Specifications Blade Diameter : 7-1/4Teeth : 18 Max rpm : 7000 Arbor : 5/8 Kerf : 0.071 Features : Fast Cutting Plate Thickness : 0.047 Hook Angle : 25