With the new replacement rollers for thread roughening pliers, we enable fitters and installers to roughen smooth threads in seconds. Sealants such as hemp, Teflon tape, or other materials shift less during assembly and reduce leaks. Hardened replacement rollers (3 pieces) for long service life. Quick roller change through screw connection. For changing the rollers of the thread roughening pliers for cylindrical or conical external threads up to a maximum of 2". Features working range diameter inches: 3/8 - 2".