This lockout device is designed for quick and easy installation with no tools needed. FUSE BLOCK LOCKOUT: Designed to secure and lockout 9/16" diameter fuse blocks with easy installation SAFETY LOCKOUT DEVICE: Positively locks out fuse blocks that previously could only be tagged SAFE BREAKER LOCKOUT: Constructed of non-conductive fiberglass nylon for safe and easy breaker lockout RELIABLE LOCKOUT: Accepts standard and compact safety padlocks for easy reliable lockout tagout ELECTRICAL RISK LOCKOUT: Lockout electrical equipment with the easy, quick and reliable lockout devices from Brady