For Use on Either Awning or Louver Type Windows This RV Window Slant Sill Operator can be used on either awning or louver type windows. It is a side mounted for slanted sills. The operator has 1-3/4 inch (44 millimeter) on center screw holes and a 1/8 inch (3.2 millimeter) long spindle. Minimum Order: 1 Package Note: The handing for this operator is determined by viewing from inside of window. One operator with installation screws per package.