How it's made. The scoop's slots are 7 mm - wide enough for clean litter to fall through, narrow enough to hold a clump - and the floor slots run front to back so the stroke does not jam. The bin takes an ordinary grocery bag; the collar drops over the rim and clamps the bag under it, and the scoop's pan nests in the collar so it parks over the bin. The handle leans back at 45 degrees, which prints without support and is easier on the wrist. PETG, washable.