Are plug socket covers bunny proof? I know they are toddler proof, but what about bunnies?

I have ordered some socket covers so my boy does not go investigating in the corner, I’m scared he might put his little toe in the socket,he has in the passed turned off my PC at the switch on the wall, so he is quite strong, so I decided to order them, because I don’t want him investigating and accidentally turn the switch on, but can he get his teeth under these socket cover?

I like him to have free playtime, do what he wants if Mummy is busy or its not care time (He’s my assistant bunny) so he can explore like all boys do.

I hope he cant’t chew through the covers, there’s nothing in the sockets of course and won’t be, I hope I can extend his pen across the back of my room this weekend if the covers arrive and know he’s in no danger with these covers, if not it’ll be plan B, screwing a metal box over the sockets which will look a mess.