Rauckman Utility Insulated Box Wrench BugWrench™The very popular 3 4 and 9 16 insulated box wrench combinations as in BW 223, and the heavy duty steel forged model BW 223HD, are just right when installing or performing maintenance on overhead transformers. The insulated box wrench handle is formulated of a high strength and high dielectric polymer. A see through port in the center of the handle to confirm that the two ends are not electrically connected. The unique design of the handle provides