Features - Front-side retrofitting of QuickFlex lighting modules without dismantling the switch. Front-side measuring and test contacts, accessible without dismantling the switch. Quick-thread screws for claw fastening. Countersunk claws with return spring. High-gloss galvanized support ring insulated from the claw. With claw and screw fastening. With plug-in terminals. To be completed with card switch system M 3156xx, 3154xx card switch with label field system design MEG3854-60xx card switch system area 3153xx version 6 A, AC 250 V.