Adjustable Impact Coffee Tamper with Threaded Base Spring-Loaded Espresso Tamper Tool 1. Professional Adjustable Impact Coffee Tamper: The espresso tamper with threaded stainless steel base, designed to deliver consistent pressure and adjustable impact force for perfect puck prep. Compatible with most commercial and home espresso machines. 2. Precision Threaded 304 Stainless Steel Base: Food-grade 304 stainless steel threaded base ensures secure alignment with portafilter baskets, enabling vertical tamping and even coffee bed compression. 3. 25-35 lb Adjustable Impact System: Rotate the built-in force calibration ring to set your desired impact pressure (25-35 lbs). Patented spring-loaded mechanism releases preset force for uniform puck density. 4. Ergonomic Anti-Slip Handle: Comfortable and labor-saving to hold, continuous powder pressing without fatigue. 5. Material: aluminum alloy + copper + 304 stainless steel 6. Specifications: 51mm53mm 7. Weight: 51mm about 285g, 53mm about 297g