Rubbermaid Commercial Rubber Tool Grips for HYGEN Microfiber Cleaning Carts, Black Rubber tool grips work as a helpful part of the HYGEN? Microfiber Cleaning Cart. They allow easy attachment of mop and broom handles. Rubber grips add convenience by allowing easy transport of important cleaning tools. Accessory Type: Tool Grip; For Use With: Rubbermaid? Commercial HYGEN? Microfiber Cleaning Carts; Material(s): Rubber; Color(s): Black.