Key Features: Finger Proof protection for IP 20 protection against accidental contact, , Captive 'never to loose screws', Tunnel terminal preventing screwdrivers from slipping, Laser marking on mechanisms. Arrow showing the correct orientation of the mechanism, The latest IS 3854:1997, Fully shrouded internal mechanism under the rocker preventing visibility of sparks, Sockets are shuttered for child's safety against electric shocks, 1 Way