Corner piece for attaching two profiles at an angle, profile, set, corner element, frame, stand construction element, stand and method and device for making thereof

A corner piece for mounting two profiles at an angle, the corner piece comprising:

• at least a first leg;
• a second leg, wherein the first and the second leg are mounted together at an angle to each other and the first leg extends along a first direction and the second leg extends along a second direction;
• wherein the first leg is arranged to be slid into a mounting channel of a first profile along the first direction and the second leg is arranged to be slid into a mounting channel of a second profile along the second direction;
• at least the first leg comprising at least one protrusion which is arranged to extend along a height direction of the mounting channel, so that when sliding the first leg into the mounting channel of the first profile, the profile clamps the first leg into a predetermined position in the mounting channel of the first profile.