invention will be illustrated with reference to the attachment of a tooth to an adaptor of a work member however the invention is not so limited and is to be considered broader in scope than the description of the illustrated embodiment referring now to fig1 7 and in particular fig1 retention assembly 10 includes a working member 12 and allows for the removal installation and retention of tooth 20 to an adaptor 40 for example the working member 12 has a plurality of discrete adaptors 40 to which a respective tooth 20 can be retained for simplification only one tooth 20 is shown in fig1 referring now to fig2 and 3 along with fig1 tooth 20 includes an exterior cutting edge 22 to perform the work function of the tooth tooth 20 includes an end wall 24 which is constructed and arranged to abut the adaptor 40 tooth 20 includes a cavity 26 with tapered walls 28 constructed and arranged to generally mate with corresponding tapered walls of adaptor 40 an opening 30 is in what will be referred to as the top wall of tooth 20 although it is understood that due to the symmetry of the tooth 20 and adaptor 40 tooth 20 may be reversibly installed on adaptor 40 such that the opening 30 may then be considered the bottom wall opposite the opening 30 in the bottom interior wall of the tooth 20 is a recess 32 constructed and arranged for receiving fastening receptacle 60 the adaptor 40 may be separate and apart from the work member 12 or may be integral to work member 12 the adaptor 40 includes an end portion 42.