The Breville BES001XL Knock Box Mini helps you knock out the most tightly packed coffee puck. Strike the portafilter against the knock bar for quick, easy and mess-free disposal of the puck. The ultra durable knock bar is designed for aggressive use. The knock bar can be removed to easily clean the inner vessel and used coffee grounds make a fantastic natural fertilizer for the garden. Features anti-slip rubber grip for increased stability on the counter top.