"Painted Metal Bracket Strong and precise movements The bracket with hinge function is located in a unit and automatically locks when the flaps are in the open position, then press the joystick to release the lock If you install your own table, this is the product. It is extremely powerful. The arms fold up and stay in place, so you don't need to tie the bottom of the table to stop moving. They click into place when extended and easily fold down when the release lever is pressed. Triangular folding stand specification: Colour: Black Hole: about 5mm Material: Steel + Baked Black Paint Angle degree: 90 degrees Package Included 2 x triangular folding bracket (not including board)"