Operator need not to change punches daily. Operator has to press a push button, which initiates pneumatic cylinder for a set period so hot punches are pressed at set temp. For the set period with a set force to mark the exact depth on battery cover. This machine is more accurate. Every Battery manufactured will have distinguished Mark on it. It can be alphabetically or numerically or Combination of both. Number of Punches can be Six/Eight/Ten or as per requirement of individual Manufacturer.