Tamper Resistant is a brass and aluminum espresso tamper that indicates to the user when they’ve tamped to 30 pounds of pressure.  This is important in making espresso because a correct tamp produces a better infusion.  I machined the parts using a lathe, mill and other metal working tools.  The bases are swappable and magnetic so that the tamper can be used with different kind of machines and portafilters with flat or convex infusers.