【Adjustable Impact Force】Professional coffee tamper with adjustable impact force, suitable for commercial and home espresso machines, ensuring precise and consistent tamping. 【Precision Tamping】304 stainless steel threaded base enables vertical and accurate tamping, adhering closely to the portafilter walls for even distribution. 【Customizable Pressure】Adjustable impact force system (25-35 lbs) with a rotatable calibration ring, utilizing a spring-loaded mechanism for consistent pressure every time. 【Ergonomic Design】Non-slip handle with ergonomic design for comfortable grip, reducing fatigue during continuous use. 【High-Quality Materials】Constructed with a combination of aluminum alloy, copper, and 304 stainless steel for durability and food-safe operation. Specifications: Materials: Aluminum alloy, Copper, 304 Stainless Steel Diameter: 53mm Weight: Approximately 297g Pressure Range: 25-35 lbs Base: 304 Stainless Steel threaded design