An improved modular handle for a tool having a plurality of handle segments, at least a grasping segment and a support segment for the tool, the segments being provided with either a male end or a female end for coupling to each other by a forced introduction. Also, dislosed is a method that, after obtaining a file containing a representation of the piece to be produced, comprises: selecting the parts to be raised; producing the piece by means of sintering; and subsequently subjecting the piece to automatic, semi-automatic or directed programming generation so that, by means of machining, the raised parts are reduced. The adjustment features are springs that can be stretched to increase the circumference of the skin.