nstallation method: 1, counterclockwise, remove the red pen front-end metal head 2, use tweezers or needle nose pliers to take out the broken ceramic sleeve 3, with the hand gently into the new ceramic sleeve, be sure to keep in mind not a brute force the installation, should be spinning makes it into place 4, back to the metal head, with a long nose pliers cushion layers of paper, appropriate efforts to tighten (or at least by hand tight).Bear in mind that not all installation process use brute force, have operation questions can contact us to confirm before they are in operation. To avoid ceramic sleeve damaged again, please Clean the fiber core after careful Insert!