Fine Grid
I use 6mm extruded wood pellets, these break down once wet, so I scoop the poop with a normal scoop, then use this to sieve out & keep the big pellets, shaking the fine saw dust into the nappy bags I use to dispose of the waste. The improvement I want is to make the front lip longer ie for the holes not to start so close front to enable it to collect more dust from the bottom of the tray. But no, it's of no use to separate normal unsoiled litter from stuck together clumps.