The 12"x16" Flat Wire Chimney Brush, ButtonLok is made of heavy-duty flat wire and is designed for tough scrubbing action. it's made with a thread and spindle design and attaches directly to ButtonLok Rods. Features: Model #: 562226. Type: Chimney Brush. heavy-duty flat wire. Designed for tough scrubbing action. Specifications: Overall Dimension: 12" x 16".