[Professional Adjustable Impact Force]This coffee tamper is suitable for commercial and home espresso machines, featuring a 304 stainless steel threaded base for precise vertical tamping with adjustable impact force. [Precision Tamping]The food-grade 304 stainless steel threaded positioning base fits tightly against the inner wall of the portafilter, ensuring even and consistent tamping without tilting. [Ergonomic Design]The non-slip handle is comfortable to grip and press, with a weighty feel that conforms to ergonomic principles for effortless tamping. [Constant Pressure with Audible Feedback]The tamper uses spring compression to provide constant pressure. When the pressure reaches the feedback column, an audible cue indicates that the critical point has been reached, signaling completion of the tamping process. [High-Quality Materials]Constructed with a combination of aluminum alloy and 304 stainless steel for durability and food safety. Specifications: Materials: Aluminum alloy and 304 stainless steel Available Sizes: 51mm, 53mm, 58.35mm Height: 96mm Weight: 51mm: Approximately 370g 53mm: Approximately 380g 58.35mm: Approximately 407g Compatible with: Commercial and home espresso machines