When installing, the housing easily fastens down to the window sill.Constructed of diecast, steel and plastic componentsComes in a beautiful, corrosion resistant, clay color painted finishDesigned for use with crank-out casement windowsFeatures a crank handle and long operator armEasy to install with only a few simple toolsFor further dimensional and specification information, please see the line drawing Ellipse series Operator by Truth, 13-1/2 in.