Safely lock out your oversized and irregularly shaped switches with our 480-600V Breaker Blocker Kit. The mounting rails are self-adhesive and are permanently installed onto an electrical panel - simply clean panel surface and adhere - no drilling required! Colour-coded blocking bars can be used to indicate if breaker is locked off (red) or on (green). * Each kit includes: 2 yellow mounting rails, 1 red blocking bar, 1 green blocking bar and 3 alcohol wipes.