The Pallo group brush is used for cleaning out and scrubbing the group head, the screens, and the portafilter baskets of your espresso machine.
The Pallo group brush is angled so that it can reach inside the portafilter, and up into the grouphead of your machine to clean around the screen. Because it is nylon, it won't scratch your metal platings.
The handle of the Pallo brush is angled so that you can scrub inside the grouphead of your espresso machine while running some water through it. The Pallo brush has a "joint" in it to angle the slope of the handle away from your hand. This way, the hot water flowing in the portafilter won't burn your hand.
While the Pallo brush is more expensive than the generic group brush, the nylon bristles are replaceable. They screw into the Pallo handle easily. These replacement bristles are sold in packs of 3. This is an excellent tool for maintaining your machine.