The customer service represents an indispensable constant for asserting oneself on the market. A supplier who delivers spare parts unfailingly and promptly is for sure highly esteemed and in this regard R.T.B. can stand any comparison. Along with the tools copies of the design work drawings will be supplied in the electronic file format required; the single tool components are each marked by a number so as to allow for immediate part identification. Thus the customer can react very rapidly and efficiently. In case the customer does not dispose of manufacturing facilities of his own, R.T.B. will manufacture the spare parts requested endeavoring to supply them as quickly as possible to the customer according to the agreements taken.