Quickly coupling socket

A socket having a hexagonal hole formed in the bottom of the socket;

• said hexagonal hole having six hexagonal sides;
• each said hexagonal side including:
• an intermediate sub-side juxtapositioned to a hexagonal nut or bolt side, two inclined sub-sides respectively inclined outwardly divergently from the intermediate sub-side;
• each said inclined sub-side inwardly extrapolatively defining a small acute angle between each said inclined sub-side and a corresponding nut or bolt side of a hexagonal nut or bolt;
• the intermediate sub-side transversely intersected with the two inclined sub-sides disposed on opposite ends of the intermediate sub-side;
• and each said inclined sub-side outwardly intersected at an apex with a neighboring inclined sub-side of another hexagonal side as hexagonally forming the hexagonal hole of the socket;
• whereby upon rotation of the socket, each said inclined sub-side of the socket will rotate in the small acute angle to be coincided with each nut or bolt side for quickly coupling the nut or bolt in the socket.