This stabilizer is used in conjunction with the Adjustable Push Block / Sliding Block designed by Eike 
 

It's used to provide extra stability when cutting a thin piece of wood that doesn't have enough of an offcut to support the push block on the outside.  It will require printing 2 of the star knobs from the original push block model and 2 hex head M6x45 bolts to hold it on and adjust it.

I printed the push block in PETG, and everything works very well together.