A. ø 5 - 6 mm string

 B. ø 8 mm string, ø 5 mm screw

C. ø 5 - 6 mm string, ø 6 - 8 mm screw 

 D. ø 5 - 6 mm string, ø 5 - 6 mm screw

 E. ø 5 - 6 mm string, ø 5 - 6 mm screw