It is pretty maddening how non-standard and unavailable these hardware parts are. This is all US made hardware but most likely all the engineering was done with no eye towards longevity. Why use cheap plastic where it is going to be under the stress? Even the quality of springs is suspect when it breaks off during normal usage. I am an engineer. I can guarantee you that this part had minimal design or endurance testing done on it. In our house, we probably have whole bunch of them given the number of drawers. Nine of of ten are non-functional Few broken within the first year and the builder fixed few under warranty.
I found the website. Of course, there is nothing like what we have. I bet they change the design every few years.
I should buy the 3D printer and should design my own. I can make something which will last forever.
The white part is the hook. The hook is spring loaded, so it wants to be in one of the two positions. There is a pin on the bottom of the drawer. The hook catches that pin. As the drawer is pushed in, the hook goes from the front to back. Because of the spring, you feel resistance in closing and once you overcome that the rest of the closing is aided by the spring snapping back. A metal base, a metal hook hinged by a pin and a spring is all need to implement this so that it will last for hundred years but then who would be redoing the kitchen every decade?
