Integrated increased contact protection in accordance with VDE 0620 Part 1. Features - Front-mounted 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: Surge protection extension set for socket with protective contact pin System M MEG2535-03xx /-04xx. LED lighting extension set for socket with protective contact pin System M MEG2534-03xx /-04xx. Control light extension set for socket with protective contact pin System M MEG2533-03xx /-04xx. Material: matt thermoplastic. Color: anthracite.