With Flowpex you only need one crimping tool but you will need to change the press tongs attached to the end depending on the size of the pipe you wish to crimp.
To attach the crimping head to the crimping tool, line up a hole at the end of one of the tails on the tongs with the hole on the crimping tool and place the securing pin through this hole.
Open the handles slightly. You will not be able to insert the other pin if the crimping jaws are fully closed.
Line up the hole on the other tongs tail and the other hole in the crimping tool and insert the other pin.
You are now ready to crimp. Remove the crimping head by following these steps in reverse.