Abstract: The invention is a quick change holding device for tools and, more particularly, for taps. The holder has an axially movable collar cooperable with holding elements which can be placed in holding position relative to an annular groove in the tap and released therefrom. The holding elements are curved, that is arcuate individual members having rounded, that is, curved, surfaces on the outsides thereof. The inner rounded or curved surface of the holding element comes into contiguous flush mating engagement with the annular groove in the tap, whereby improved holding capability is achieved.