Klein Tools' Multi-Groove Fiberglass Fish Tapes feature a low-friction, easy feed design. The grooved profile and fiberglass core provide rigidity for long distances and less surface contact with wires when pushing through crowded conduit. The non-conductive fish tape and non-conductive eyelet tip offer added protection against shock from energized sources. Klein Tools' Multi-Groove Fiberglass Fish Tapes feature a low-friction, easy feed design. The grooved profile and fiberglass core provide rigidity for long distances and less surface contact with wires when pushing through crowded conduit. The non-conductive fish tape and non-conductive eyelet tip offer added protection against shock from energized sources. Non-conductive fish tape and eyelet tip offer added protection against shock from energized sources The 17-Inch case diameter means you can reel in 10-percent more tape in a single revolution vs. a 16-Inch case Klein Tools' Multi-Groove Fiberglass Fish Tapes feature a low-friction, easy feed design. The grooved profile and fiberglass core provide rigidity for long distances and less surface contact with wires when pushing through crowded conduit. The non-conductive fish tape and non-conductive eyelet tip offer added protection against shock from energized sources.