Then, when the drilling screw is hammered into a steel plate and the like with {TAIL ~ an impact type air driven screw fastener}, the sharp taper bit can be inserted through the steel plate and the like with {HEAD ~ small resistance} 
Then , when the drilling screw is hammered into a steel plate and the like with { TAIL ~ an impact type air driven screw fastener } , the sharp taper bit can be inserted through the steel plate and the like with { HEAD ~ small resistance }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD