Prefabricated tuned top and launcher for launching tuned top

A prefabricated tuned top comprising:

• a body at its center comprising a screw groove formed to a predetermined depth;
• a rim positioned and retained on an upper end of the body;
• a plurality of iron beads varying a center of gravity according to stored arrangement forms of the iron beads in the body;
• a knob screw-coupled to the body to prevent separation of the iron beads and to fix the rim by pressing the rim onto the body;
• and
• a spinning spindle mounted such that a portion of a lower end of the spinning spindle is exposed after penetrating through the body, the spinning spindle is pressed and fixed by a bottom surface of the knob;
• wherein the body comprises a spindle hole perforated from a bottom end of the screw groove through the body, the spindle hole being formed such that a diameter of an upper end of the spindle hole is larger than a diameter of a bottom end of the spindle hole but smaller than a diameter of the screw groove, and the spindle hole comprises a stepped portion between the upper end and the bottom end;
• wherein the spinning spindle is inserted through the screw groove and into the spindle hole, and the spinning spindle is retained and fixed to the spindle hole such that the prefabricated tuned top is spinnable by user's fingers;
• and
• wherein the rim comprises crash form portions formed on an outer circumferential surface of the rim, the crash form portion being embossed, engraved or formed in combination of embossment and engraving.