the opposite mating surface conventionally the exterior 70 of the handle core 12 is formed with elongated grooves 71 indentations 72 bosses 73 or other suitable surface treatments effects or textures to maximize the frictional contact between the surface of core 12 and the encapsulating overmolded material 14 the purpose of this arrangement is to prevent slippage of the overmolded layer 14 on the handle core 12 during usage additionally the overmolded layer 14 serves to further insure the integrity of the handle core and blade assembly in the preferred embodiment the handle core 12 is generally bilaterally symmetrical in section the top portion 66 is flattened or otherwise conformed to provide ergonomic fit to the user 39 s hand while axial symmetry of the handle core 12 allows either end 53 to be oriented as the front or rear of the handle it may be advantageous and the invention is adaptable to conform the handle with asymmetrical ends or to design a grout float with the handle cantilevered from one end that end being mounted to the blade by means of tongues and a flange in precisely the manner previously described in connection with each of the ends of the embodiment depicted in the drawing neither of these embodiments being shown the use of a tongue 16 17 and flange 18 arrangement for attaching the blade 19 to the handle 12 allows a single handle core 12 to be used with blades 19 of various sizes and shapes while not shown in the drawings the retaining means associated with the bosses and receptacles.