This insulated box end wrench set allow telephone and electric utility personnel to work around energized bus bars or back-up batteries safely. They are ideal for use in power systems in central office facilities and by subcontractors.

This eight-piece set includes one each of the following sizes: 3/8" (4 7/8" long), 7/16" (5 1/2" long), 1/2" (6" long), 9/16" (6 5/8" long), 5/8" (7 1/4" long), 1 1/16" (8" long), 3/4" (8 3/4" long) and 3/16" (9 3/8" long).