Lock out all breakers at once with Brady panel lockout - Electrical Business
Lockout Tagout for Electrical Safety: Tips and Best Practices | Lockout Tagout Shop - lockout-tagout-shop
Circuit-Safe circuit breaker lockout hardware from Stranco Inc. is an easy & secure breaker lockout device that is permanently mounted to the panel. | Stranco Inc
Amazon.com: TRADESAFE Electrical Lockout Tagout Kit - Hasps, Clamp on and Universal Multipole Circuit Breaker Lockouts, Loto Tags, Plug Lockout, Loto Locks Set (1 Key Per Lock) for Safe Electrical Lockouts Red :
Lockout tagout device for breakers: Locks out the entire panel.