This clip replaces the stock clip for the Karas Kustoms Ink fountain pen. It can be used to delete the regular clip and use a lanyard and bead if desired (not included).It uses the original screws and will require a 5/64" hex wrench to install (not included). Be careful not to strip the screws when installing the clip. Lightly tighten each screw before snugging them up. Fully tightening one screw before the other can result in stripping out the threads on the cap of the pen. Very little pressure is needed. Contact me if you have questions. There will be some texture on the part from the printing process. To learn more about that process, look here- https://www.shapeways.com/materials/steel?li=nav