Hook style adjustable by a small screw of 2.5
the best is to tap but one can create the step by doing it with the screw itself.
3 pieces: 1 fixed on board eg 1 wall with hook the other without (invisible)
fixing screws 3mm max with tapered head of 90 ° angle (eg agglo screw)
object attention lightweight
Slowly: 30 mm / s, 150μ, filling 20%
but I had left the settings so as you wish
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