"The Diablo Steel Demon 7in. 38 Tooth Circular Saw Blade is a high-performance blade designed to cut thick ferrous metals mild steel only, including steel studs, angle iron, flat bar, channel, EMT conduit, all-thread rod and pipe. Features a super-thin laser cut kerf, Perma-Shield nonstick coating, laser-cut stabilizer vents, tri-metal shock-resistant brazing and more. Tooth Grind TCG, Teeth qty. 38, Blade Diameter in. 7, Arbor Size in. 20mm. Super-thin laser cut kerf for effortless cutting performance Tico hi-density carbide provides a controlled carbide wear that stays sharper longer Perma-Shield nonstick coating shields the blade against heat, gumming and corrosion Laser-cut stabilizer vents trap noise and vibration and stabilizes the blade Tri-metal shock-resistant brazing allows carbide tips to withstand extreme impact Laser-cut heat expansion slots allow blade to expand due to heat build-up, keeping the cut true and straight"