The "Wooster 9" Acme Cage Frame" sounds like a painting tool, more precisely a roller frame for applying paint to walls or other surfaces. The name "Acme Cage Frame" is most likely referring to the roller frame's brand or model.
Wooster is a well-known brand in the painting industry that produces high-quality painting tools and accessories. Their roller frames are often built with sturdy materials and ergonomic designs to make painting activities more efficient and comfortable.
The "9 inch" specification most likely relates to the width of the roller frame and the maximum width of the roller cover that may be affixed to it. This size is typically used when painting walls and larger surfaces.