This model made of solid metal must be equipped with an additional fastening set. In addition, it should be noted that the angle does not have a cover cap.
Overview of product data for angle bracket 20x40 B-type groove 6:
Nut: 6
Type: B
Material: metal
Fixing kit (optional): 4 x hammer nut B-type groove 6 [M4], 4 x fixing screw angle 20 + 20x40, DIN 7984 M4x8 vz.