This listing is for Square D's version of the very popular Siemens breaker lock ECQL1 that I sell 1000's of a year. These work very well to keep a circuit break either locked on of off!! 

 To be clear these are for SQ D QO breakers only, if your looking for the other ones search for ECQL1 ( you'll find me) they fit most other breakers. 



These are New but old stock so some of the packages are a little rough/ dirty but rest assured the breaker locks are all brand new!