This is the outside handle only for the 3 post storm door handle.
Replaces Old Style 3 screw posts on brass outside handle. 
Handle uses 5/16 inch square spindle 
spacing for screws for inside handle and deadbolt thumb turn P1 to P2  is 1-3/4 inch hole 
top screw to bottom screw P1 to P3  is 5-1/2 inch 

NOTE: there is another handle set that has 4 posts and the spacing from top to bottom screw is 4-7/8 inches.- - these are not interchangable. 
The replacement Handle set is actually 5-7/16 but will work with little or no adjustments. Does not come with screws. 

THIS IS THE OUTSIDE HANDLE ONLY. Comes with 2 keys, no screws
Related Storm Door Hardware:
301045 - Complete Handle set Brass Exterior - White or Tan interior