I do not have a sample of the track to measure so I can only measure the socket opening. I created a new image to show exactly what measures 1" and what measures 13/16". In the profile drawing of the drawer socket you can see there is a narrower slot to the right of where the 1" is measured. That narrower slot measures 13/16". Take a look at the included image and let me know if you have any further questions.

Profile diagram of 32-012