The Rapz single notcher is a pneumatic steel strapping sealer. This applies two sets of notches each time the trigger is pulled which saves time and labor for the operator. Other pneumatic strapping sealers require the operator to pull the trigger, move the sealer on the seal, and pull the trigger a second time. This applies all four notches at once. A single notch seal equates to roughly 50% joint efficiency, while a double notch is 70-80% efficiency. Using a double notch sealer guarantees the best and strongest seal at the weakest spot, the joint.