Product review (5 stars): It fit my Model 665. 13969K013 Kenmore dishwasher perfectly ...
It fit my Model 665.13969K013 Kenmore dishwasher perfectly (It came in a "Whirlpool Corporation Factory Certified Parts" Box).  As others have mentioned, it definitely seems sturdier than the OEM part it replaced.  Note the roller size as apparently some are different--this is the 7/8" version.  Others have mentioned you need a Torx screwdriver, but my kit came with a Torx to Phillips converter (I still used a Torx, but just FYI).  Installation was about 15 minutes (I had already removed the old hardware, so that is JUST installation).  No instructions, but a link to a website with a decent instruction sheet.  Once you figure out side 1, side 2 goes very quick.