15 of the shank member 13 for cooperative engagement therebetween in addition the internal gripping surface of the collet member may be constructed and arranged to exert a tensile force on the shank member when compressed this construction allows precise clamping forces to be applied to an assembly allows full surface engagement between the shank member and the collet member and facilitates a locking connection without inserts or adhesive the collet member 11 may also include a flared base 19 suitable to distribute clamping force over a wide area or provide a bearing surface for relative rotation of adjacent components the collet member may be constructed of materials well known in the art which may include but should not be limited to steel bronze brass copper aluminum plastic or rubber as well as suitable combinations thereof the compression ring 12 shown in fig5 through 7 has a tapered interior surface 20 which is complementary to the taper of collet member 11 the compression ring 12 may be constructed with a flange 21 about the upper surface the flange 21 may have optional lugs 22 formed in a c shape for engaging an extractor not shown used to remove or disconnect the coupling the flange may also have optional wrench flats 23 for engaging wrenches and or sockets that are well known in the art the shank member 13 is generally illustrated in fig8 through 10 the shank member includes an outer gripping surface 15 which is preferably round in shape but may be oval hex d shaped square rectangular or have other shapes well known in the art that are suitable for shank and or shaft use the outer gripping surface may.