MK Old Style Single Grid Switch Yoke Earth Terminal also fits metal socket boxes

MK MH4348BLACK Dimensions 4 Gang 8 Module Grid Mounting Frame Black

MK Grid Plus - K3701 - One Gang One Module Grid Mounting Frame

MK Grid Plus - K3701 - One Gang One Module Grid Mounting Yoke/Frame New

MK Grid Plus - K3702 - 2G Grid Mounting Frame

13 x MK K3701 Grid Plus - 1G Grid Mounting Frame

MK Grid plus 2 gang yoke Mounting plate MK 325284

Crabtree 6902 2Gang Grid Yoke Mounting Frame