zeroHero 58mm Sword Espresso Impact TamperThe zeroHero Sword Tamper guarantees that you get consistent force and level tamping every time. Helping to produce the best and most consistent Espresso possible. How It Works Firstly, the collar of the tamper makes sure that the tamping plate is parallel to the the basket before you apply pressure. Then you press down on the tamper until a force of 13kg (30lbs), at this point the spring mechanism in the tamper will not allow any more force to be