4 piece set
The last 2 pictures show it put together. (I have a piece of carboard between to be able to separate) Please look at my listings to see the other retainers I have listed.
The magnetic part has a metal plate behind with a screw.
The top part is a metal disc with plastic with a screw.
FlexFit Bed Mattress Mounts Non Slip Retainer Plastic Top & Bottom
Please ask any questions.
Excellent Condition
Please review photos as part of the description.
Smoke free home. Thank you for looking.