This is a counting accessory for H-, J-Frame circuit breakers. This is for a drawout installation for a panel. The plug-in base provides mounting through a front panel or mounting on rails for a 2-3 pole drawout mounted circuit breaker. This product complies with UL and CSA standards. This base has a tightening torque of 2.5-2.5 Nm. This product complies with UL and CSA standards.