This power flanger has the "auto-guide" feature, which automatically controls the forming of a right- angle flange. It will contour and follow any edge, straight or curved. Using the convenient table slot, the operator merely turns up a starting edge, starts the material through the rolls and lets go. A calibrated dial sets the auto-guide for work with radii as small as 3-1/4". Two flange heights are available. Please specify 3/8" or 1/4".