FeaturesIndividual circuit breaker can be locked in the off position quickly and easily without any tools, no tool installationCompact, universal design fits a wide range of single, double and triple handle circuit breakersEasily attached with no modifications to panel or circuit breaker and does not require hole in circuit breaker handleConstructed of rugged nylon and stainless-steel providing strength, durability, added security and corrosion resistanceAccommodates breaker handle dimensions up to 0.3 to 0.6 in tall and 0.25 to 0.44 in THKCan be installed by hand with no tool required