Using these Rothenberger Romax 4000 press jaws is easy. First, make sure your press machine has an axial thrust of 32 - 34 kN. Then, simply attach the press jaw to your machine. When you're ready to press, you can open the jaw with just one finger thanks to the 3 - bolt synchronized mechanism. Position it correctly on the metal or plastic fitting you want to press and start the pressing process. As for maintenance, to keep the press jaws in good condition, take advantage of the long - term corrosion protection. Regularly check for any signs of wear. If you notice excessive wear, it might be time to replace the jaws. Store them in a dry place to prevent rusting and damage. And always follow the safety instructions of your press machine when using these jaws.