The Roto-Die Pneumatic Open End Cleat Bender allows "L" Shaped duct sections to lay outside the bending area. Preset back gauge can be adjusted from 7/16 to 1/2 inch allowing a full 180 degree bend. Bending lengths from 3 inches through 29 1/2 inches with a 20 gauge maximum of 20 gauge mild steel. Air consumption is less than 0.5 cubic feet per stroke @ 100 pounds per square inch with a maximum of 50 strokes per minute.