Equipped with 304 stainless steel base featuring rippled texture for increased area, providing durability and for consistent, coffee brewing Designed with rounded aluminum grip for comfortable hold, balanced weight distribution, and nonslip operations, reducing fatigue during prolonged professional use 58mm stainless steel base designed to work with most inner diameter 58mm portafilters and espresso machine models Combines stainless steel and aluminum through machining process, offering robust structure for stable daily coffee tamping operations Features triple spring energy storage structure that delivers constant pressure for even coffee tamping, ensuring uniform and avoiding channeling in espresso preparation