THE MASTER LOCK S3823 GRIP TIGHT™ PLUS CIRCUIT BREAKER LOCKOUT DEVICE FITS OVERSIZED HANDLE CIRCUIT BREAKERS (480/600 V). ITS LIGHTWEIGHT ONE-PIECE DESIGN EASILY AND CONSISTENTLY INSTALLS WITHOUT USE OF TOOLS. THE STAINLESS STEEL THUMBSCREW AND CURVED BLADE PROVIDE A TIGHT GRIP ON THE CIRCUIT BREAKER HANDLE SO DEVICE REMAINS SECURE. A FOLD-DOWN CLEAT PROVIDES ENHANCED SWITCH THROW BLOCKING WHEN NEEDED. COMPATIBLE WITH A WIDE VARIETY OF CIRCUIT BREAKER HANDLE SHAPES AND SIZES.