This is a holder for a kitchen scale with a round glass plate. It holds the kitchen scale securely in place while still allowing it to slide in and out freely.
The holder can be glued or screwed on, both up and down or vertically, and with the open side up or sideways. The holes are countersunk for 3x16mm wood screws.
The plate diameter of the kitchen scale is 160mm, and is 4mm thick, with a pencil sharpened edge.
Two of the three holes fit the Ikea Besta (and probably others) perfectly. This means you will be able to mount it without messing up the existing holes with 3x16 wood screws :)