SGT90020 Features: -Use these high quality blades to cut through a variety of metals, fiberglass and plastic. -Great for body work and exhaust work. -These bi-metal blades contain cobalt for long lasting, shatterproof use. -Maximum speed is 10,000 strokes per minute. Product Type: -Recip. Dimensions: Overall Length - End to End: -2 Inches. Overall Height - Top to Bottom: -0.1 Inches. Overall Product Weight: -0.03 Pounds.