Tool quick-change set for medical hand-held machine tool

A connection set for connecting a tool to a hand-held machine tool, comprising:

• a receptacle for being fastened to a machine tool and for receiving an insert;
• an insert for attachment to a tool and for the releasable, at least sectionally, insertion into the receptacle,
• wherein
• the receptacle circumscribes a lumen of the receptacle which is continuous in the longitudinal direction of the receptacle, and the insert circumscribes a lumen of the insert which is continuous in the longitudinal direction of the insert;
• the receptacle comprises at least one stationary pin which projects from an inner wall of the receptacle into the lumen of the receptacle and is stationary relative to the inner wall, and at least one movable pin which is movable relative to the inner wall and likewise projects into the lumen of the receptacle;
• and
• the insert comprises on its outside at least one guide each of which is for guiding the at least one movable pin along the outside of the insert when the insert is being inserted into the lumen of the receptacle.