This white patio door handle is a surface with clamp latch style. Often found on older style patio doors, it is mounted on the door's inside frame and the clamp latch latches onto an extrusion (astragal) on the jamb. It has 2 in. handle height extruded aluminum inside handle. The clamp has a 1/4 in. profile and 1/2 in. projection when in locked position. The outside handle is a mill finish, low profile non-keyed handle. To key this unit order Prime-Line part E 2000.