THIS LISTING IS FOR 1 PACKAGE EACH PACKAGE CONTAINS 50 PCS OF PART #ECQTH3   HANDLE TIE DEVICE 

These are Handle Ties, Used to join two single pole breaker handles, generally used when you have two single pole side by side breakers that share a neutral and therefore must by code turn off together.

 For Use With BQ, BQH, HBQ, BLH, HBL Circuit Breakers '



- Handle tie
- Locks two breaker handles together for common operation
- Can be used on Siemens single pole type QP
- Can be used on Murray single pole type MP-T

I have personally discovered that they will also work with some other brands too.