an optional rear sleeve member 114 a body member 116 and jaws 118 body member 116 is generally cylindrical in shape and comprises a nose or forward section 120 and a tail or rearward section 122 an axial bore 124 is formed in the nose section 120 of the body member 116 axial bore 124 is somewhat larger than the largest tool shank that the chuck is designed to accommodate a threaded bore 126 is formed in tail section 122 of body 116 and is of a standard size to mate with the drive shaft of a powered or hand driver not shown the bores 124 126 may communicate at the central region 128 of body member 116 while a threaded bore 126 is illustrated such bore could be replaced with a tapered bore of a standard size to mate with a tapered drive shaft passageways 130 are formed in body member 116 to accommodate each jaw 118 preferably three jaws 118 are employed and each jaw 118 is separated from the adjacent jaw by an arc of approximately 120 degrees the axes of the passageways 130 and the jaws 118 are angled with respect to the chuck axis but intersect the chuck.