Extension sets in {HEAD ~ accordance} with {TAIL ~ the present invention} can be freely used in difficult working environments, for example, a carpenters workshop, a building site, and the like, and are designed not to leave residual marks as may be left when using the extension set illustrated and described in US Patent Application Publication 
Extension sets in { HEAD ~ accordance } with { TAIL ~ the present invention } can be freely used in difficult working environments , for example , a carpenters workshop , a building site , and the like , and are designed not to leave residual marks as may be left when using the extension set illustrated and described in US Patent Application Publication
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH