Abstract: A single piece wire winding tool for winding a first part of a wire about a second part of the wire while providing a loop in the wire intermediate the first and second wire parts. One of the contemplated uses is that of making wire leaders for fishing tackle. The tool has a longitudinal axis, a slotted end defined by cheeks with their inner surfaces being the sided of the slot, and a hole formed with its axis perpendicularly skew to the tool's longitudinal axis and extending through the cheeks and therefore opening through the slot. The method aspect of the invention relates to the manner of using the tool to accomplish the desired winding of the wire. The wire to be wound has the first part laid in the slot and extending beyond the slot to provide the remainder of a leader. The second wire part is inserted through the hole and extends for a relatively short distance beyond the hole.