Connection kit and a holder with the connection kit

A holder with a connection kit, comprising:

• the connection kit, wherein the connection kit comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve, the inner sleeve comprising a plurality of second gaps, a hollow connecting portion, a plurality of jaws respectively connected to one end of the connecting portion and a plurality of male threads respectively arranged on outer walls of the plurality of jaws;
• the outer sleeve comprising a sleeve body and a female thread arranged on an inner wall of the sleeve body, and the plurality of the jaws and the plurality of second gaps being arranged in a separated manner;
• the sleeve body being able to be sleeved outside the plurality of jaws;
• when the sleeve body is sleeved outside the plurality of jaws and moves towards the connecting portion, the female thread being able to be respectively engaged with a teeth of the plurality of male threads, and the sleeve body being able to squeeze the plurality of jaws towards a central axis of the connecting portion to drive the plurality of jaws closer to each other;
• a connecting rod running through a hollow space of the connecting portion;
• and
• a mounting joint sleeved outside the connecting portion and able to be coupled with the connecting portion,
• wherein the plurality of jaws are circumferentially arranged outside the connecting rod and able to be against an outer wall of the connecting rod, and
• wherein the inner sleeve further comprises two annular limit bumps at two ends of the connecting portion, two ends of the mounting joint respectively being able to be against the two limit bumps, and the height of the limit bump adjacent to the jaws being greater than the height of an other limit bump.