Hillyard, Grout Brush Swivel Head

Unger Swivel Grout Brush 977200 - The Home Depot

ST11G - 8 1/2'' grout scrub, swivel connector, very stiff, green

Unger Lock-On Swivel Grout Brush 975200 - The Home Depot

Grout Gator Cleaning Brush w/Handle, 4 Adjustable Heads

Unger Professional Swivel Grout & Corner Scrub Brush – Compatible

Professional Tile & Grout Cleaning Brush w/ 180

Full Circle Home Grunge Buster Tile and Grout Brush

The Unger outdoor scrub brush has tough bristles for tough cleaning jobs. Use it on decks and outdoor areas. You can also use it in corners and to clean multiple surfaces at one time. Stiff bristles on four sides for tough cleaning on decks, stairs and corners.

Unger - 977200 Swivel Grout and Corner Scrub Brush

General Swivel Grout Brush

Full Circle Home Grunge Buster Tile and Grout Brush

Unger Lock-On Swivel Grout Brush 975200 - The Home Depot