Arms supplied with a groove
On the top of the arm, there is carried out a 12 mm groove (possibility to change the dimension) in which you place your fixing of your choice.
Arm supplied with a half sphere fastening
The top of the arm is equipped with a tenon in which we place a wooden half sphere (dimension and drilling to be specified together) where you can place a metal piece (not provided) which enables you to fix these arms on your busts.
Arms supplied with a nut and a wooden screw
In the groove, we place a wooden articulation provided with a thread on which a nut is placed that you fix at your bust.