These are designed in place of the expensive rear-mounted brackets for Lontan soft-close cabinet drawer sliders (they're a popular Amazon brand). I've added the Fusion 360 file if you'd like to adjust for your particular brand.
They're designed to perfectly hold the top and bottom of the slides without them falling out, but allow the drawer sliders to adjust in and out to the correct depth of the cabinet. I've used them while adding soft-close drawers to my kitchen cabinets and they've worked great!
Drawer sliders:
https://www.amazon.com/dp/B0B82GMKMX?psc=1
Brackets this model replaces:
https://www.amazon.com/dp/B07KK7PNMK?th=1
Bracket dimensions:
Print details:
The author marked this model as their own original creation.