gullets configured as various letters to enable acronyms abbreviations or words to be formed in this manner tools 10 110 etc may be customized for particular purchasers for example turning now to fig4 a tool 210 manufactured by u201c saint gobain abrasives inc u201d may be customized with a repeating pattern of u201c s u201d u201c t u201d and u201c g u201d shaped gullets 218 218 u2032 218 u2033 in addition to alphanumeric indicia the gullets may be configured in the form of a corporate logo an example of a corporate logo that may be suitable for such use is the nike u00ae swoosh u00ae logo nike corporation beaverton oreg this embodiment thus provides a non removable trademark indication of source of origin which may serve as a convenient means for maintaining brand identity among their customers this embodiment also provides a convenient means for u2018 brand labeling u2019 the tools for re sale such as by configuring the gullets with indicia associated with the customer reseller in this manner the reseller may be provided with a customized tool line for sale to its end user customers this approach including the nominally permanent marking may encourage greater brand loyalty by their customers also as discussed hereinabove while the gullets 18 118 etc combine identification with the functional aspects of stress.