Klein Tools 56057 Fish Tape 50-Foot is Non-Conductive Fiberglass, Flexible, Pull Line to 500-Pound Multiple grooves molded into the fish tape provides less friction in conduit with or without wires for smoother tape feeding Non-conductive fish tape and eyelet tip offer added protection against shock from energized sources The 13-Inch case diameter means you can reel in 15-percent more tape in a single revolution vs. a standard 12-Inch case Raised fingergrips help transfer 100-percent of the winding power from your hand and fingers The unique sloped handle optimizes the position of your hand for quick hand-over-hand rewinds and allows a more level payout of tape on the backswing while feeding conduit