Wirestarter™ is a hollow stainless steel tube with grip used to channel cord and wire through urethane. To use, push the tube through the urethane, insert the wire through the tube, then pull Wirestarter™ out, leaving the wire in. Be sure to lay the flat side of the aluminum handle against the glass and then use your thumb or fingers to push the tube through the urethane. Also, be sure to concentrate your force directly in line with the tube. Failure to follow these directions may result in the tube bending.