Spare Blade For Sheet Metal Shear A754 Shear has a cutting capacity of 18 gauge (1.2mm) mild steel. Designed for body shops, sheet metal shop & tinsmiths. Fitted with heavy duty cutting blades for a long life. Removes a 1/4" strip of material, with minimal deformation. Speed 2, 100rpm. operating pressure 90psi, air consumption 4.0cfm