Made With Matrix II High Speed Steel Teeth Containing 8 Percent Cobalt To Keep A Sharper Tooth Edge Longer. Faster Cutting, Longer Life Blades That Can Bend Without Shattering. Fleam Filed Teeth. This Blade Has A 1/2 Inch Universal Tang That Fits All Sawzalls And Standard Competitive Saws. Applications: Nail Free Wood & Plastics.