The Brady No-Hole 480/600-Volt Circuit Breaker Lockout accepts lock shackles up to 9/32 in. in diameter. The lockout is constructed of rugged polypropylene and impact-modified nylon. Also known as -Brady 65397 Clamp-On Breaker Lockout 480/600 Volt Rugged Polypropylene And Impa-Lockout Kits: Brady Electrical Supplies No-Hole 480/600-Volt Circuit Breaker Loc