Universal fastening apparatus

A universal fastening apparatus, comprising:

• a primary clamping portion, having a first end and a second end, the primary clamping portion comprising a pair of primary clamping units, a first rotary space and a second rotary space being defined between the primary clamping units, the first rotary space being adjacent to the first end, the second rotary space being adjacent to the second end, the first rotary space comprising a first spherical slot, the second rotary space comprising an annular slot, the annular slot having an opening located at the second end of the primary clamping portion, a bore diameter of the opening being smaller than a biggest diameter of the annular slot;
• a first ball unit, having a first ball and a first neck extending from the first ball, the first ball being selectively rotatably disposed in the first spherical slot;
• a secondary clamping portion, having a received end and a clamping end, the secondary clamping portion comprising a pair of secondary clamping units, the received end being defined at lower ends of the secondary clamping units, a third rotary space being defined between the secondary clamping units, the third rotary space being adjacent to the clamping end, the third rotary space comprising a second spherical slot, the received end being selectively rotatably disposed in the annular slot;
• a second ball unit, having a second ball and a second neck extending from the second ball, the second ball being selectively rotatably disposed in the second spherical slot;
• a pressing means for pressing the primary clamping units to tightly clamp the first ball and the received end of the secondary clamping portion so that the first ball and the received end become non-rotatable with respect to the primary clamping portion, and for further pressing the secondary clamping units to tightly clamp the second ball so that the second ball becomes non-rotatable with respect to the secondary clamping portion.