Summary

I have modified the holder to my requirements to make it independent of the thickness of the table and screw holes.
The diameter of the bracket I increased by 0.1mm.

For attaching to the table top, I recommend double-sided padded adhesive tape.

(Product example: https://www.amazon.de/dp/B016UUOZBI/ref=cm_sw_em_r_mt_dp_-HwMzbQBXSM00)

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/bjTL4lZ4lAr

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Prusa Clone</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0,2</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>20</p></div></p>

Magic Keypad Holder with adhesive sheet