Sentence:  ... provision is made for the attachment thereto of various operating tools, such, for example, as drills, saws, grindstones, polishers, and cutters, or <WSD>abraders</WSD> or shapers of various kinds. 
Meaning of the word marked with <WSD> tags:  Something that abrades; a tool or machine for abrading. (First attested in the mid-19th century.)