About This Exact 58mm/58.35mm Fit – Designed for commercial and home espresso machines using standard 58mm baskets. Uniform 30lb Pressure – Calibrated spring applies consistent tamping force for balanced extractions. Flat Stainless Steel Base – Durable, rust-resistant, and built for long-term performance. Self-Leveling Palm Design – Keeps tamper perfectly horizontal to prevent uneven shots. Barista-Quality Performance – Improves crema, aroma, and flavor for a true café-style espresso.