This 3/16" Reel Rod traceable fish tape has a sturdy, powder coated, steel tube frame and features a 16" diameter storage cage. A light adjustable brake prevents the rod from reeling out of the basket under its own tension. The Reel Rod and the 51000 series standard Fish Rod share common screw threads, allowing the use of the same accessories. The Reel Rod traceable fish tapes use 20 copper wire imbedded in the rod to allow a signal to be transmitted down the entire length of the rod. A Roller Guide is recommended to create a better connection between the end of the rod and the wall of the ducting. This helps the signal to complete the circuit back to earth.