Square D 1-in Main Breaker Kit

Retains circuit breakers to the interior of a QO load center. Compact and lightweight. Compatible with QO612L100F/S, RB, QO612L100DF/S, QO816L100F/S, RB, QO816L100DF/S and QO148L125GF/S, GRB load centers. ANSI certified.