Integrated increased contact protection in accordance with VDE 0620 Part 1. Features - Front-side retrofitting of QuickFlex additional modules without dismantling the socket. 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 screw lift terminals for rigid and flexible conductors up to 4 mm². Accessories Large label field with tactile contrast symbol for rockers and sockets with label field 434791/92/93/94. Color aluminum.