| http://www.w3.org/ns/prov#value | - Work engaging end 16 may comprise a substantially flat face 21, although the configuration of such face is not critical to the invention except as will be made more apparent hereinafter. (For example, FIG. 1A shows drill bit 10 modified to have a stepped face 21 at work engaging end 16.) Shaft 12 is formed with an elongate flute 24 in side wall 18 thereof extending from work end face 21 towards dr
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