The coffee knock box solves the extremely messy problem of removing the used grinds from your coffee machine or group handle. Deep bent design makes coffee slag is not easy to splash. Made of ABS material, good cushioning properties, protects the handle of coffee machine. Made of ABS material, good cushioning properties, protects the handle of coffee machine. Detachable rubber bar, easy to clean. Rubber bar and plastic body reduce the noise when in use.