Thread your needles quickly with the help of our Desk Needle Threader. For sewing and quilting needles. Applicable Needles: Clover Needles (thickness: 0.51-0.89mm), works best with oval eye needles. Simply insert the thread and hold it gently, then insert the needle eye down into the needle hole. Press the lever once (press the lever softly while holding the thread gently) and then pull the needles and cut the thread.