This chrome handle features a 5/16" square shaft that extends 4" from the outside surface of the door.  The shaft can be cut shorter, if necessary.

The handle is 4" long.  Mounting holes are 1-3/4" on center.

Includes 2 keys.

This style lock is found on some mid-60s Shasta trailers.  Also found on Cal Craft and many other canned ham style trailers starting in the mid-1950s.  

Please check dimensions carefully to be sure it will work on your trailer.